78888521422 has 32 divisors (see below), whose sum is σ = 125472981312. Its totient is φ = 37124127744.

The previous prime is 78888521419. The next prime is 78888521443. The reversal of 78888521422 is 22412588887.

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, 720828 + ... + 823024.

It is an arithmetic number, because the mean of its divisors is an integer number (3921030666).

Almost surely, 2^78888521422 is an apocalyptic number.

78888521422 is a deficient number, since it is larger than the sum of its proper divisors (46584459890).

78888521422 is a wasteful number, since it uses less digits than its factorization.

78888521422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102492.

The product of its digits is 4587520, while the sum is 55.

The spelling of 78888521422 in words is "seventy-eight billion, eight hundred eighty-eight million, five hundred twenty-one thousand, four hundred twenty-two".