22727985658 has 36 divisors (see below), whose sum is σ = 40602067290. Its totient is φ = 9513964656.

The previous prime is 22727985641. The next prime is 22727985677. The reversal of 22727985658 is 85658972722.

It can be written as a sum of positive squares in only one way, i.e., 21487748569 + 1240237089 = 146587^2 + 35217^2 .

It is a super-2 number, since 2×22727985658² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22727985596 and 22727985605.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 118488 + ... + 243916.

Almost surely, 2^22727985658 is an apocalyptic number.

22727985658 is a deficient number, since it is larger than the sum of its proper divisors (17874081632).

22727985658 is a wasteful number, since it uses less digits than its factorization.

22727985658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125531 (or 125481 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 61.

The spelling of 22727985658 in words is "twenty-two billion, seven hundred twenty-seven million, nine hundred eighty-five thousand, six hundred fifty-eight".