13775622557 has 2 divisors, whose sum is σ = 13775622558. Its totient is φ = 13775622556.

The previous prime is 13775622541. The next prime is 13775622587. The reversal of 13775622557 is 75522657731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10598496601 + 3177125956 = 102949^2 + 56366^2 .

It is a cyclic number.

It is not a de Polignac number, because 13775622557 - 2⁴ = 13775622541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13775622517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6887811278 + 6887811279.

It is an arithmetic number, because the mean of its divisors is an integer number (6887811279).

Almost surely, 2^13775622557 is an apocalyptic number.

It is an amenable number.

13775622557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13775622557 is an equidigital number, since it uses as much as digits as its factorization.

13775622557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3087000, while the sum is 50.

The spelling of 13775622557 in words is "thirteen billion, seven hundred seventy-five million, six hundred twenty-two thousand, five hundred fifty-seven".