78415280064 has 112 divisors (see below), whose sum is σ = 251483408640. Its totient is φ = 23762200320.

The previous prime is 78415280039. The next prime is 78415280173. The reversal of 78415280064 is 46008251487.

It is a super-2 number, since 2×78415280064² (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 15 ways as a sum of consecutive naturals, for example, 2043684 + ... + 2081699.

Almost surely, 2^78415280064 is an apocalyptic number.

It is an amenable number.

78415280064 is an abundant number, since it is smaller than the sum of its proper divisors (173068128576).

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

78415280064 is a wasteful number, since it uses less digits than its factorization.

78415280064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125415 (or 4125399 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 78415280064 in words is "seventy-eight billion, four hundred fifteen million, two hundred eighty thousand, sixty-four".