51919968281532 has 144 divisors (see below), whose sum is σ = 136895722306560. Its totient is φ = 15279706700544.

The previous prime is 51919968281483. The next prime is 51919968281537. The reversal of 51919968281532 is 23518286991915.

51919968281532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (69) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51919968281537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 852948394 + ... + 853009262.

It is an arithmetic number, because the mean of its divisors is an integer number (950664738240).

Almost surely, 2^{51919968281532} is an apocalyptic number.

51919968281532 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51919968281532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68447861153280).

51919968281532 is an abundant number, since it is smaller than the sum of its proper divisors (84975754025028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51919968281532 is a wasteful number, since it uses less digits than its factorization.

51919968281532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79212 (or 79197 counting only the distinct ones).

The product of its digits is 83980800, while the sum is 69.

The spelling of 51919968281532 in words is "fifty-one trillion, nine hundred nineteen billion, nine hundred sixty-eight million, two hundred eighty-one thousand, five hundred thirty-two".