72857353056 has 96 divisors (see below), whose sum is σ = 195417266688. Its totient is φ = 23757196800.

The previous prime is 72857353043. The next prime is 72857353061. The reversal of 72857353056 is 65035375827.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16696731 + ... + 16701093.

It is an arithmetic number, because the mean of its divisors is an integer number (2035596528).

Almost surely, 2^72857353056 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 72857353056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97708633344).

72857353056 is an abundant number, since it is smaller than the sum of its proper divisors (122559913632).

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

72857353056 is a wasteful number, since it uses less digits than its factorization.

72857353056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124 (or 8116 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 51.

The spelling of 72857353056 in words is "seventy-two billion, eight hundred fifty-seven million, three hundred fifty-three thousand, fifty-six".