71630921768 has 32 divisors (see below), whose sum is σ = 153950347200. Its totient is φ = 30607863552.

The previous prime is 71630921753. The next prime is 71630921777. The reversal of 71630921768 is 86712903617.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1878938 + ... + 1916681.

It is an arithmetic number, because the mean of its divisors is an integer number (4810948350).

Almost surely, 2^71630921768 is an apocalyptic number.

It is an amenable number.

71630921768 is an abundant number, since it is smaller than the sum of its proper divisors (82319425432).

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

71630921768 is a wasteful number, since it uses less digits than its factorization.

71630921768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795969 (or 3795965 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 71630921768 in words is "seventy-one billion, six hundred thirty million, nine hundred twenty-one thousand, seven hundred sixty-eight".