78971116324 has 27 divisors (see below), whose sum is σ = 140244206011. Its totient is φ = 38909752280.

The previous prime is 78971116321. The next prime is 78971116333. The reversal of 78971116324 is 42361117987.

The square root of 78971116324 is 281018.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78971116321) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39903567 + ... + 39905545.

Almost surely, 2^78971116324 is an apocalyptic number.

78971116324 is the 281018-th square number.

It is an amenable number.

78971116324 is a deficient number, since it is larger than the sum of its proper divisors (61273089687).

78971116324 is an frugal number, since it uses more digits than its factorization.

78971116324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104 (or 2052 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

Multiplying 78971116324 by its sum of digits (49), we get a square (3869584699876 = 1967126²).

The spelling of 78971116324 in words is "seventy-eight billion, nine hundred seventy-one million, one hundred sixteen thousand, three hundred twenty-four".