22638715657 has 2 divisors, whose sum is σ = 22638715658. Its totient is φ = 22638715656.

The previous prime is 22638715621. The next prime is 22638715679. The reversal of 22638715657 is 75651783622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19853937216 + 2784778441 = 140904^2 + 52771^2 .

It is a cyclic number.

It is not a de Polignac number, because 22638715657 - 2⁷ = 22638715529 is a prime.

It is a super-3 number, since 3×22638715657³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (22638715607) 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 as a sum of consecutive naturals, namely, 11319357828 + 11319357829.

It is an arithmetic number, because the mean of its divisors is an integer number (11319357829).

Almost surely, 2^22638715657 is an apocalyptic number.

It is an amenable number.

22638715657 is a deficient number, since it is larger than the sum of its proper divisors (1).

22638715657 is an equidigital number, since it uses as much as digits as its factorization.

22638715657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 52.

The spelling of 22638715657 in words is "twenty-two billion, six hundred thirty-eight million, seven hundred fifteen thousand, six hundred fifty-seven".