72157100205620 has 48 divisors (see below), whose sum is σ = 154376310388608. Its totient is φ = 28323944626560.

The previous prime is 72157100205607. The next prime is 72157100205637. The reversal of 72157100205620 is 2650200175127.

It is a super-2 number, since 2×72157100205620² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102021311 + ... + 102726150.

It is an arithmetic number, because the mean of its divisors is an integer number (3216173133096).

Almost surely, 2^{72157100205620} is an apocalyptic number.

It is an amenable number.

72157100205620 is an abundant number, since it is smaller than the sum of its proper divisors (82219210182988).

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

72157100205620 is a wasteful number, since it uses less digits than its factorization.

72157100205620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204747800 (or 204747798 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 72157100205620 in words is "seventy-two trillion, one hundred fifty-seven billion, one hundred million, two hundred five thousand, six hundred twenty".