78172580570 has 32 divisors (see below), whose sum is σ = 164551989888. Its totient is φ = 26178723648.

The previous prime is 78172580543. The next prime is 78172580599. The reversal of 78172580570 is 7508527187.

It is a super-2 number, since 2×78172580570² (a number of 23 digits) contains 22 as substring.

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, 12982469 + ... + 12988488.

It is an arithmetic number, because the mean of its divisors is an integer number (5142249684).

Almost surely, 2^78172580570 is an apocalyptic number.

78172580570 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78172580570 is an abundant number, since it is smaller than the sum of its proper divisors (86379409318).

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

78172580570 is a wasteful number, since it uses less digits than its factorization.

78172580570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25971014.

The product of its (nonzero) digits is 1097600, while the sum is 50.

The spelling of 78172580570 in words is "seventy-eight billion, one hundred seventy-two million, five hundred eighty thousand, five hundred seventy".