78247924964 has 12 divisors (see below), whose sum is σ = 149382402288. Its totient is φ = 35567238600.

The previous prime is 78247924943. The next prime is 78247924967. The reversal of 78247924964 is 46942974287.

It is a super-2 number, since 2×78247924964² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78247924897 and 78247924906.

It is not an unprimeable number, because it can be changed into a prime (78247924967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889180922 + ... + 889181009.

It is an arithmetic number, because the mean of its divisors is an integer number (12448533524).

Almost surely, 2^78247924964 is an apocalyptic number.

It is an amenable number.

78247924964 is a deficient number, since it is larger than the sum of its proper divisors (71134477324).

78247924964 is a wasteful number, since it uses less digits than its factorization.

78247924964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778361946 (or 1778361944 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 62.

The spelling of 78247924964 in words is "seventy-eight billion, two hundred forty-seven million, nine hundred twenty-four thousand, nine hundred sixty-four".