22909985557 has 2 divisors, whose sum is σ = 22909985558. Its totient is φ = 22909985556.

The previous prime is 22909985531. The next prime is 22909985591. The reversal of 22909985557 is 75558990922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13997492721 + 8912492836 = 118311^2 + 94406^2 .

It is a cyclic number.

It is not a de Polignac number, because 22909985557 - 2¹⁵ = 22909952789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22909985495 and 22909985504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22909985257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11454992778 + 11454992779.

It is an arithmetic number, because the mean of its divisors is an integer number (11454992779).

Almost surely, 2^22909985557 is an apocalyptic number.

It is an amenable number.

22909985557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22909985557 is an equidigital number, since it uses as much as digits as its factorization.

22909985557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412000, while the sum is 61.

The spelling of 22909985557 in words is "twenty-two billion, nine hundred nine million, nine hundred eighty-five thousand, five hundred fifty-seven".