22956345689581 has 4 divisors (see below), whose sum is σ = 22959389901564. Its totient is φ = 22953301477600.

The previous prime is 22956345689573. The next prime is 22956345689593. The reversal of 22956345689581 is 18598654365922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10403914760100 + 12552430929481 = 3225510^2 + 3542941^2 .

It is a cyclic number.

It is not a de Polignac number, because 22956345689581 - 2³ = 22956345689573 is a prime.

It is a super-2 number, since 2×22956345689581² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22956345689561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1522094680 + ... + 1522109761.

It is an arithmetic number, because the mean of its divisors is an integer number (5739847475391).

Almost surely, 2^{22956345689581} is an apocalyptic number.

It is an amenable number.

22956345689581 is a deficient number, since it is larger than the sum of its proper divisors (3044211983).

22956345689581 is an equidigital number, since it uses as much as digits as its factorization.

22956345689581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044211982.

The product of its digits is 1119744000, while the sum is 73.

The spelling of 22956345689581 in words is "twenty-two trillion, nine hundred fifty-six billion, three hundred forty-five million, six hundred eighty-nine thousand, five hundred eighty-one".