13537340657 has 4 divisors (see below), whose sum is σ = 13538329920. Its totient is φ = 13536351396.

The previous prime is 13537340653. The next prime is 13537340689. The reversal of 13537340657 is 75604373531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75604373531 = 1433 ⋅52759507.

It is a cyclic number.

It is not a de Polignac number, because 13537340657 - 2² = 13537340653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13537340653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473813 + ... + 501570.

It is an arithmetic number, because the mean of its divisors is an integer number (3384582480).

Almost surely, 2^13537340657 is an apocalyptic number.

It is an amenable number.

13537340657 is a deficient number, since it is larger than the sum of its proper divisors (989263).

13537340657 is an equidigital number, since it uses as much as digits as its factorization.

13537340657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989262.

The product of its (nonzero) digits is 793800, while the sum is 44.

The spelling of 13537340657 in words is "thirteen billion, five hundred thirty-seven million, three hundred forty thousand, six hundred fifty-seven".