122564825279 has 4 divisors (see below), whose sum is σ = 131992888776. Its totient is φ = 113136761784.

The previous prime is 122564825261. The next prime is 122564825293. The reversal of 122564825279 is 972528465221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 972528465221 = 28111 ⋅34596011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122564825279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122564825279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122564825219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4714031729 + ... + 4714031754.

It is an arithmetic number, because the mean of its divisors is an integer number (32998222194).

Almost surely, 2^122564825279 is an apocalyptic number.

122564825279 is a deficient number, since it is larger than the sum of its proper divisors (9428063497).

122564825279 is an equidigital number, since it uses as much as digits as its factorization.

122564825279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9428063496.

The product of its digits is 4838400, while the sum is 53.

The spelling of 122564825279 in words is "one hundred twenty-two billion, five hundred sixty-four million, eight hundred twenty-five thousand, two hundred seventy-nine".