78113209856 has 40 divisors (see below), whose sum is σ = 170262399384. Its totient is φ = 35506001920.

The previous prime is 78113209841. The next prime is 78113209879. The reversal of 78113209856 is 65890231187.

It is a super-2 number, since 2×78113209856² (a number of 23 digits) contains 22 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, 6929135 + ... + 6940398.

Almost surely, 2^78113209856 is an apocalyptic number.

It is an amenable number.

78113209856 is an abundant number, since it is smaller than the sum of its proper divisors (92149189528).

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

78113209856 is a wasteful number, since it uses less digits than its factorization.

78113209856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13869562 (or 13869546 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 78113209856 in words is "seventy-eight billion, one hundred thirteen million, two hundred nine thousand, eight hundred fifty-six".