13123255577 has 2 divisors, whose sum is σ = 13123255578. Its totient is φ = 13123255576.

The previous prime is 13123255573. The next prime is 13123255589. The reversal of 13123255577 is 77555232131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12889287961 + 233967616 = 113531^2 + 15296^2 .

It is a cyclic number.

It is not a de Polignac number, because 13123255577 - 2² = 13123255573 is a prime.

It is not a weakly prime, because it can be changed into another prime (13123255573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561627788 + 6561627789.

It is an arithmetic number, because the mean of its divisors is an integer number (6561627789).

Almost surely, 2^13123255577 is an apocalyptic number.

It is an amenable number.

13123255577 is a deficient number, since it is larger than the sum of its proper divisors (1).

13123255577 is an equidigital number, since it uses as much as digits as its factorization.

13123255577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 220500, while the sum is 41.

The spelling of 13123255577 in words is "thirteen billion, one hundred twenty-three million, two hundred fifty-five thousand, five hundred seventy-seven".