78923912356 has 27 divisors (see below), whose sum is σ = 145788469281. Its totient is φ = 37379954304.

The previous prime is 78923912323. The next prime is 78923912359. The reversal of 78923912356 is 65321932987.

The square root of 78923912356 is 280934.

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

It can be written as a sum of positive squares in only one way, i.e., 12780302500 + 66143609856 = 113050^2 + 257184^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78923912297 and 78923912306.

It is not an unprimeable number, because it can be changed into a prime (78923912359) 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, 10671796 + ... + 10679188.

Almost surely, 2^78923912356 is an apocalyptic number.

78923912356 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

78923912356 is the 280934-th square number.

It is an amenable number.

78923912356 is a deficient number, since it is larger than the sum of its proper divisors (66864556925).

78923912356 is an frugal number, since it uses more digits than its factorization.

78923912356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14828 (or 7414 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 55.

The spelling of 78923912356 in words is "seventy-eight billion, nine hundred twenty-three million, nine hundred twelve thousand, three hundred fifty-six".