72100005712566 has 32 divisors (see below), whose sum is σ = 155293308511488. Its totient is φ = 22184475925920.

The previous prime is 72100005712547. The next prime is 72100005712589. The reversal of 72100005712566 is 66521750000127.

It is a happy number.

It is a Curzon number.

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, 9738175 + ... + 15460661.

It is an arithmetic number, because the mean of its divisors is an integer number (4852915890984).

Almost surely, 2^{72100005712566} is an apocalyptic number.

72100005712566 is an abundant number, since it is smaller than the sum of its proper divisors (83193302798922).

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

72100005712566 is a wasteful number, since it uses less digits than its factorization.

72100005712566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5884036.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 72100005712566 in words is "seventy-two trillion, one hundred billion, five million, seven hundred twelve thousand, five hundred sixty-six".