71990893464 has 64 divisors (see below), whose sum is σ = 205798752000. Its totient is φ = 20557778304.

The previous prime is 71990893459. The next prime is 71990893477. The reversal of 71990893464 is 46439809917.

It is a junction number, because it is equal to n+sod(n) for n = 71990893398 and 71990893407.

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, 201187 + ... + 429485.

It is an arithmetic number, because the mean of its divisors is an integer number (3215605500).

Almost surely, 2^71990893464 is an apocalyptic number.

It is an amenable number.

71990893464 is an abundant number, since it is smaller than the sum of its proper divisors (133807858536).

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

71990893464 is a wasteful number, since it uses less digits than its factorization.

71990893464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230192 (or 230188 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 71990893464 in words is "seventy-one billion, nine hundred ninety million, eight hundred ninety-three thousand, four hundred sixty-four".