72858732891 has 32 divisors (see below), whose sum is σ = 116675209728. Its totient is φ = 39566257920.

The previous prime is 72858732853. The next prime is 72858732911. The reversal of 72858732891 is 19823785827.

It is not a de Polignac number, because 72858732891 - 2⁶ = 72858732827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72858732491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1056930 + ... + 1123751.

It is an arithmetic number, because the mean of its divisors is an integer number (3646100304).

Almost surely, 2^72858732891 is an apocalyptic number.

72858732891 is a deficient number, since it is larger than the sum of its proper divisors (43816476837).

72858732891 is a wasteful number, since it uses less digits than its factorization.

72858732891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180771.

The product of its digits is 13547520, while the sum is 60.

The spelling of 72858732891 in words is "seventy-two billion, eight hundred fifty-eight million, seven hundred thirty-two thousand, eight hundred ninety-one".