22647541081 has 9 divisors (see below), whose sum is σ = 24895397919. Its totient is φ = 20587168800.

The previous prime is 22647541073. The next prime is 22647541087. The reversal of 22647541081 is 18014574622.

The square root of 22647541081 is 150491.

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., 21182182681 + 1465358400 = 145541^2 + 38280^2 .

It is not a de Polignac number, because 22647541081 - 2³ = 22647541073 is a prime.

It is a super-2 number, since 2×22647541081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22647541087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1648561 + ... + 1662241.

Almost surely, 2^22647541081 is an apocalyptic number.

22647541081 is the 150491-st square number.

22647541081 is the 75246-th centered octagonal number.

It is an amenable number.

22647541081 is a deficient number, since it is larger than the sum of its proper divisors (2247856838).

22647541081 is an frugal number, since it uses more digits than its factorization.

22647541081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27384 (or 13692 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 22647541081 in words is "twenty-two billion, six hundred forty-seven million, five hundred forty-one thousand, eighty-one".