53156720672 has 96 divisors (see below), whose sum is σ = 118482678720. Its totient is φ = 23253959680.

The previous prime is 53156720671. The next prime is 53156720693. The reversal of 53156720672 is 27602765135.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (53156720671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3227723 + ... + 3244149.

It is an arithmetic number, because the mean of its divisors is an integer number (1234194570).

Almost surely, 2^53156720672 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 53156720672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59241339360).

53156720672 is an abundant number, since it is smaller than the sum of its proper divisors (65325958048).

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

53156720672 is a wasteful number, since it uses less digits than its factorization.

53156720672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16794 (or 16786 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 53156720672 in words is "fifty-three billion, one hundred fifty-six million, seven hundred twenty thousand, six hundred seventy-two".