22611387641 has 2 divisors, whose sum is σ = 22611387642. Its totient is φ = 22611387640.

The previous prime is 22611387637. The next prime is 22611387647. The reversal of 22611387641 is 14678311622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19797615616 + 2813772025 = 140704^2 + 53045^2 .

It is a cyclic number.

It is not a de Polignac number, because 22611387641 - 2² = 22611387637 is a prime.

It is a super-2 number, since 2×22611387641² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22611387647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11305693820 + 11305693821.

It is an arithmetic number, because the mean of its divisors is an integer number (11305693821).

Almost surely, 2^22611387641 is an apocalyptic number.

It is an amenable number.

22611387641 is a deficient number, since it is larger than the sum of its proper divisors (1).

22611387641 is an equidigital number, since it uses as much as digits as its factorization.

22611387641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The spelling of 22611387641 in words is "twenty-two billion, six hundred eleven million, three hundred eighty-seven thousand, six hundred forty-one".