13137777577 has 4 divisors (see below), whose sum is σ = 13590804420. Its totient is φ = 12684750736.

The previous prime is 13137777533. The next prime is 13137777581. The reversal of 13137777577 is 77577773131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11097358336 + 2040419241 = 105344^2 + 45171^2 .

It is a cyclic number.

It is not a de Polignac number, because 13137777577 - 2¹⁹ = 13137253289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13137772577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226513378 + ... + 226513435.

It is an arithmetic number, because the mean of its divisors is an integer number (3397701105).

Almost surely, 2^13137777577 is an apocalyptic number.

It is an amenable number.

13137777577 is a deficient number, since it is larger than the sum of its proper divisors (453026843).

13137777577 is an equidigital number, since it uses as much as digits as its factorization.

13137777577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453026842.

The product of its digits is 5294205, while the sum is 55.

The spelling of 13137777577 in words is "thirteen billion, one hundred thirty-seven million, seven hundred seventy-seven thousand, five hundred seventy-seven".