22651835561 has 4 divisors (see below), whose sum is σ = 22652301012. Its totient is φ = 22651370112.

The previous prime is 22651835537. The next prime is 22651835573. The reversal of 22651835561 is 16553815622.

It is a happy number.

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 13748969536 + 8902866025 = 117256^2 + 94355^2 .

It is a cyclic number.

It is not a de Polignac number, because 22651835561 - 2¹⁰ = 22651834537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22651835161) 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, 149900 + ... + 260333.

It is an arithmetic number, because the mean of its divisors is an integer number (5663075253).

Almost surely, 2^22651835561 is an apocalyptic number.

It is an amenable number.

22651835561 is a deficient number, since it is larger than the sum of its proper divisors (465451).

22651835561 is an equidigital number, since it uses as much as digits as its factorization.

22651835561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465450.

The product of its digits is 432000, while the sum is 44.

The spelling of 22651835561 in words is "twenty-two billion, six hundred fifty-one million, eight hundred thirty-five thousand, five hundred sixty-one".