123322664978 has 6 divisors (see below), whose sum is σ = 184984742421. Its totient is φ = 61661084172.

The previous prime is 123322664903. The next prime is 123322664989. The reversal of 123322664978 is 879466223321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123297192769 + 25472209 = 351137^2 + 5047^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=248317.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 372476 + ... + 620792.

Almost surely, 2^123322664978 is an apocalyptic number.

123322664978 is a deficient number, since it is larger than the sum of its proper divisors (61662077443).

123322664978 is an frugal number, since it uses more digits than its factorization.

123322664978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496636 (or 248319 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 53.

The spelling of 123322664978 in words is "one hundred twenty-three billion, three hundred twenty-two million, six hundred sixty-four thousand, nine hundred seventy-eight".