22138426964864 has 64 divisors (see below), whose sum is σ = 51433116684000. Its totient is φ = 9487897251840.

The previous prime is 22138426964851. The next prime is 22138426964869. The reversal of 22138426964864 is 46846962483122.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 22138426964864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22138426964869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252079217 + ... + 252167024.

Almost surely, 2^{22138426964864} is an apocalyptic number.

It is an amenable number.

22138426964864 is an abundant number, since it is smaller than the sum of its proper divisors (29294689719136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22138426964864 is an frugal number, since it uses more digits than its factorization.

22138426964864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504246276 (or 504246250 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 65.

The spelling of 22138426964864 in words is "twenty-two trillion, one hundred thirty-eight billion, four hundred twenty-six million, nine hundred sixty-four thousand, eight hundred sixty-four".