78818254585656 has 16 divisors (see below), whose sum is σ = 197045636464200. Its totient is φ = 26272751528544.

The previous prime is 78818254585523. The next prime is 78818254585691. The reversal of 78818254585656 is 65658545281887.

It is a super-3 number, since 3×78818254585656³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642046970511 + ... + 1642046970558.

Almost surely, 2^{78818254585656} is an apocalyptic number.

It is an amenable number.

78818254585656 is an abundant number, since it is smaller than the sum of its proper divisors (118227381878544).

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

78818254585656 is a wasteful number, since it uses less digits than its factorization.

78818254585656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284093941078 (or 3284093941074 counting only the distinct ones).

The product of its digits is 5160960000, while the sum is 78.

The spelling of 78818254585656 in words is "seventy-eight trillion, eight hundred eighteen billion, two hundred fifty-four million, five hundred eighty-five thousand, six hundred fifty-six".