72821953835 has 16 divisors (see below), whose sum is σ = 90216134400. Its totient is φ = 56371489920.

The previous prime is 72821953829. The next prime is 72821953843. The reversal of 72821953835 is 53835912827.

It is not a de Polignac number, because 72821953835 - 2⁴ = 72821953819 is a prime.

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, 1541141 + ... + 1587689.

It is an arithmetic number, because the mean of its divisors is an integer number (5638508400).

Almost surely, 2^72821953835 is an apocalyptic number.

72821953835 is a deficient number, since it is larger than the sum of its proper divisors (17394180565).

72821953835 is a wasteful number, since it uses less digits than its factorization.

72821953835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56678.

The product of its digits is 3628800, while the sum is 53.

The spelling of 72821953835 in words is "seventy-two billion, eight hundred twenty-one million, nine hundred fifty-three thousand, eight hundred thirty-five".