78432553922 has 6 divisors (see below), whose sum is σ = 117649424979. Its totient is φ = 39216078930.

The previous prime is 78432553919. The next prime is 78432553933. The reversal of 78432553922 is 22935523487.

It can be written as a sum of positive squares in only one way, i.e., 39216276961 + 39216276961 = 198031^2 + 198031^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=198031.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 297047 + ... + 495077.

Almost surely, 2^78432553922 is an apocalyptic number.

78432553922 is a deficient number, since it is larger than the sum of its proper divisors (39216871057).

78432553922 is an frugal number, since it uses more digits than its factorization.

78432553922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396064 (or 198033 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 50.

Multiplying 78432553922 by its sum of digits (50), we get a square (3921627696100 = 1980310²).

The spelling of 78432553922 in words is "seventy-eight billion, four hundred thirty-two million, five hundred fifty-three thousand, nine hundred twenty-two".