78520315882 has 16 divisors (see below), whose sum is σ = 121692938112. Its totient is φ = 37976869840.

The previous prime is 78520315847. The next prime is 78520315931. The reversal of 78520315882 is 28851302587.

It is a super-2 number, since 2×78520315882² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5209078 + ... + 5224129.

It is an arithmetic number, because the mean of its divisors is an integer number (7605808632).

Almost surely, 2^78520315882 is an apocalyptic number.

78520315882 is a deficient number, since it is larger than the sum of its proper divisors (43172622230).

78520315882 is a wasteful number, since it uses less digits than its factorization.

78520315882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433333.

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 78520315882 in words is "seventy-eight billion, five hundred twenty million, three hundred fifteen thousand, eight hundred eighty-two".