70312721996 has 72 divisors (see below), whose sum is σ = 139071960720. Its totient is φ = 31068385920.

The previous prime is 70312721993. The next prime is 70312722017. The reversal of 70312721996 is 69912721307.

It is a self number, because there is not a number n which added to its sum of digits gives 70312721996.

It is not an unprimeable number, because it can be changed into a prime (70312721993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2783495 + ... + 2808641.

It is an arithmetic number, because the mean of its divisors is an integer number (1931555010).

Almost surely, 2^70312721996 is an apocalyptic number.

It is an amenable number.

70312721996 is a deficient number, since it is larger than the sum of its proper divisors (68759238724).

70312721996 is a wasteful number, since it uses less digits than its factorization.

70312721996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25335 (or 25322 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 70312721996 in words is "seventy billion, three hundred twelve million, seven hundred twenty-one thousand, nine hundred ninety-six".