78818599904256 has 99 divisors (see below), whose sum is σ = 227589457735731. Its totient is φ = 26272582539264.

The previous prime is 78818599904249. The next prime is 78818599904269. The reversal of 78818599904256 is 65240999581887.

The square root of 78818599904256 is 8877984.

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

78818599904256 is a `hidden beast` number, since 7 + 8 + 8 + 18 + 5 + 99 + 90 + 425 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 852240225 + ... + 852332703.

Almost surely, 2^{78818599904256} is an apocalyptic number.

78818599904256 is the 8877984-th square number.

It is an amenable number.

78818599904256 is an abundant number, since it is smaller than the sum of its proper divisors (148770857831475).

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

78818599904256 is an frugal number, since it uses more digits than its factorization.

78818599904256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184984 (or 92484 counting only the distinct ones).

The product of its (nonzero) digits is 3135283200, while the sum is 81.

The spelling of 78818599904256 in words is "seventy-eight trillion, eight hundred eighteen billion, five hundred ninety-nine million, nine hundred four thousand, two hundred fifty-six".