13558222957 has 2 divisors, whose sum is σ = 13558222958. Its totient is φ = 13558222956.

The previous prime is 13558222949. The next prime is 13558222967. The reversal of 13558222957 is 75922285531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11309471716 + 2248751241 = 106346^2 + 47421^2 .

It is a cyclic number.

It is not a de Polignac number, because 13558222957 - 2³ = 13558222949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13558222957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13558222907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6779111478 + 6779111479.

It is an arithmetic number, because the mean of its divisors is an integer number (6779111479).

Almost surely, 2^13558222957 is an apocalyptic number.

It is an amenable number.

13558222957 is a deficient number, since it is larger than the sum of its proper divisors (1).

13558222957 is an equidigital number, since it uses as much as digits as its factorization.

13558222957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 49.

The spelling of 13558222957 in words is "thirteen billion, five hundred fifty-eight million, two hundred twenty-two thousand, nine hundred fifty-seven".