72105020056 has 64 divisors (see below), whose sum is σ = 151905715200. Its totient is φ = 31906288128.

The previous prime is 72105020051. The next prime is 72105020093. The reversal of 72105020056 is 65002050127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72105020051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10800 + ... + 379903.

It is an arithmetic number, because the mean of its divisors is an integer number (2373526800).

Almost surely, 2^72105020056 is an apocalyptic number.

It is an amenable number.

72105020056 is an abundant number, since it is smaller than the sum of its proper divisors (79800695144).

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

72105020056 is a wasteful number, since it uses less digits than its factorization.

72105020056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390808 (or 390804 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 72105020056 in words is "seventy-two billion, one hundred five million, twenty thousand, fifty-six".