51667241940 has 144 divisors (see below), whose sum is σ = 161557224192. Its totient is φ = 13358523648.

The previous prime is 51667241939. The next prime is 51667241947. The reversal of 51667241940 is 4914276615.

51667241940 is a `hidden beast` number, since 5 + 166 + 72 + 419 + 4 + 0 = 666.

51667241940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51667241947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 876682 + ... + 933758.

It is an arithmetic number, because the mean of its divisors is an integer number (1121925168).

Almost surely, 2^51667241940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51667241940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80778612096).

51667241940 is an abundant number, since it is smaller than the sum of its proper divisors (109889982252).

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

51667241940 is a wasteful number, since it uses less digits than its factorization.

51667241940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57246 (or 57241 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 51667241940 in words is "fifty-one billion, six hundred sixty-seven million, two hundred forty-one thousand, nine hundred forty".