72100805900 has 36 divisors (see below), whose sum is σ = 159787668768. Its totient is φ = 28226696640.

The previous prime is 72100805897. The next prime is 72100805941. The reversal of 72100805900 is 950800127.

It is a super-2 number, since 2×72100805900² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7665599 + ... + 7674998.

Almost surely, 2^72100805900 is an apocalyptic number.

It is an amenable number.

72100805900 is an abundant number, since it is smaller than the sum of its proper divisors (87686862868).

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

72100805900 is a wasteful number, since it uses less digits than its factorization.

72100805900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15340658 (or 15340651 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 72100805900 in words is "seventy-two billion, one hundred million, eight hundred five thousand, nine hundred".