22399911555 has 64 divisors (see below), whose sum is σ = 42124769280. Its totient is φ = 9949492224.

The previous prime is 22399911539. The next prime is 22399911559. The reversal of 22399911555 is 55511999322.

It is a Cunningham number, because it is equal to 149666²-1.

It is not a de Polignac number, because 22399911555 - 2⁴ = 22399911539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22399911498 and 22399911507.

It is not an unprimeable number, because it can be changed into a prime (22399911559) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3139402 + ... + 3146528.

It is an arithmetic number, because the mean of its divisors is an integer number (658199520).

Almost surely, 2^22399911555 is an apocalyptic number.

22399911555 is a deficient number, since it is larger than the sum of its proper divisors (19724857725).

22399911555 is a wasteful number, since it uses less digits than its factorization.

22399911555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7988.

The product of its digits is 1093500, while the sum is 51.

The spelling of 22399911555 in words is "twenty-two billion, three hundred ninety-nine million, nine hundred eleven thousand, five hundred fifty-five".