72100455867 has 48 divisors (see below), whose sum is σ = 122376923136. Its totient is φ = 40449024000.

The previous prime is 72100455857. The next prime is 72100455887. The reversal of 72100455867 is 76855400127.

72100455867 is a `hidden beast` number, since 7 + 21 + 0 + 0 + 45 + 586 + 7 = 666.

It is not a de Polignac number, because 72100455867 - 2⁴ = 72100455851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72100455857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 440134 + ... + 581307.

It is an arithmetic number, because the mean of its divisors is an integer number (2549519232).

Almost surely, 2^72100455867 is an apocalyptic number.

72100455867 is a deficient number, since it is larger than the sum of its proper divisors (50276467269).

72100455867 is a wasteful number, since it uses less digits than its factorization.

72100455867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021512 (or 1021509 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 72100455867 in words is "seventy-two billion, one hundred million, four hundred fifty-five thousand, eight hundred sixty-seven".