71863001920 has 56 divisors (see below), whose sum is σ = 172257159168. Its totient is φ = 28554816000.

The previous prime is 71863001911. The next prime is 71863001957. The reversal of 71863001920 is 2910036817.

It is a self number, because there is not a number n which added to its sum of digits gives 71863001920.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 695296 + ... + 791935.

Almost surely, 2^71863001920 is an apocalyptic number.

It is an amenable number.

71863001920 is an abundant number, since it is smaller than the sum of its proper divisors (100394157248).

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

71863001920 is a wasteful number, since it uses less digits than its factorization.

71863001920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487399 (or 1487389 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 71863001920 in words is "seventy-one billion, eight hundred sixty-three million, one thousand, nine hundred twenty".