22643626615551 has 20 divisors (see below), whose sum is σ = 33966019933824. Its totient is φ = 15033113092800.

The previous prime is 22643626615543. The next prime is 22643626615567. The reversal of 22643626615551 is 15551662634622.

22643626615551 is a `hidden beast` number, since 2 + 2 + 6 + 4 + 3 + 6 + 26 + 61 + 5 + 551 = 666.

It is not a de Polignac number, because 22643626615551 - 2³ = 22643626615543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643626635551) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 579961695 + ... + 580000736.

Almost surely, 2^{22643626615551} is an apocalyptic number.

22643626615551 is a deficient number, since it is larger than the sum of its proper divisors (11322393318273).

22643626615551 is a wasteful number, since it uses less digits than its factorization.

22643626615551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159962684 (or 1159962675 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 54.

The spelling of 22643626615551 in words is "twenty-two trillion, six hundred forty-three billion, six hundred twenty-six million, six hundred fifteen thousand, five hundred fifty-one".