71636421822 has 32 divisors (see below), whose sum is σ = 173372182272. Its totient is φ = 19263575424.

The previous prime is 71636421817. The next prime is 71636421859. The reversal of 71636421822 is 22812463617.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 50164848 + ... + 50166275.

It is an arithmetic number, because the mean of its divisors is an integer number (5417880696).

Almost surely, 2^71636421822 is an apocalyptic number.

71636421822 is an abundant number, since it is smaller than the sum of its proper divisors (101735760450).

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

71636421822 is a wasteful number, since it uses less digits than its factorization.

71636421822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100331152.

The product of its digits is 193536, while the sum is 42.

The spelling of 71636421822 in words is "seventy-one billion, six hundred thirty-six million, four hundred twenty-one thousand, eight hundred twenty-two".