22911625718881 has 27 divisors (see below), whose sum is σ = 23511804608019. Its totient is φ = 22326659019600.

The previous prime is 22911625718867. The next prime is 22911625718887. The reversal of 22911625718881 is 18881752611922.

The square root of 22911625718881 is 4786609.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 745043459281 + 22166582259600 = 863159^2 + 4708140^2 .

It is not a de Polignac number, because 22911625718881 - 2⁷ = 22911625718753 is a prime.

It is a super-2 number, since 2×22911625718881² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22911625718887) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 38249792220 + ... + 38249792818.

Almost surely, 2^{22911625718881} is an apocalyptic number.

22911625718881 is the 4786609-th square number.

22911625718881 is the 2393305-th centered octagonal number.

It is an amenable number.

22911625718881 is a deficient number, since it is larger than the sum of its proper divisors (600178889138).

22911625718881 is an frugal number, since it uses more digits than its factorization.

22911625718881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582 (or 791 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 61.

The spelling of 22911625718881 in words is "twenty-two trillion, nine hundred eleven billion, six hundred twenty-five million, seven hundred eighteen thousand, eight hundred eighty-one".