78842645064 has 24 divisors (see below), whose sum is σ = 213532163910. Its totient is φ = 26280881664.

The previous prime is 78842645059. The next prime is 78842645087. The reversal of 78842645064 is 46054624887.

It is a happy number.

78842645064 is a `hidden beast` number, since 78 + 8 + 4 + 2 + 64 + 506 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 48342816900 + 30499828164 = 219870^2 + 174642^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 78842645064.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 547518297 + ... + 547518440.

Almost surely, 2^78842645064 is an apocalyptic number.

It is an amenable number.

78842645064 is an abundant number, since it is smaller than the sum of its proper divisors (134689518846).

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

78842645064 is a wasteful number, since it uses less digits than its factorization.

78842645064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095036749 (or 1095036742 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 78842645064 in words is "seventy-eight billion, eight hundred forty-two million, six hundred forty-five thousand, sixty-four".