78055500775 has 24 divisors (see below), whose sum is σ = 115425183744. Its totient is φ = 51196648800.

The previous prime is 78055500707. The next prime is 78055500829. The reversal of 78055500775 is 57700555087.

It is not a de Polignac number, because 78055500775 - 2²³ = 78047112167 is a prime.

It is a super-2 number, since 2×78055500775² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9692311 + ... + 9700360.

It is an arithmetic number, because the mean of its divisors is an integer number (4809382656).

Almost surely, 2^78055500775 is an apocalyptic number.

78055500775 is a deficient number, since it is larger than the sum of its proper divisors (37369682969).

78055500775 is a wasteful number, since it uses less digits than its factorization.

78055500775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19392711 (or 19392706 counting only the distinct ones).

The product of its (nonzero) digits is 1715000, while the sum is 49.

The spelling of 78055500775 in words is "seventy-eight billion, fifty-five million, five hundred thousand, seven hundred seventy-five".