122642405661 has 16 divisors (see below), whose sum is σ = 170641597824. Its totient is φ = 78202770624.

The previous prime is 122642405621. The next prime is 122642405687. The reversal of 122642405661 is 166504246221.

It is not a de Polignac number, because 122642405661 - 2³⁵ = 88282667293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122642405621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1958935 + ... + 2020571.

It is an arithmetic number, because the mean of its divisors is an integer number (10665099864).

Almost surely, 2^122642405661 is an apocalyptic number.

It is an amenable number.

122642405661 is a deficient number, since it is larger than the sum of its proper divisors (47999192163).

122642405661 is a wasteful number, since it uses less digits than its factorization.

122642405661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90500.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 122642405661 in words is "one hundred twenty-two billion, six hundred forty-two million, four hundred five thousand, six hundred sixty-one".