13137543442661 has 4 divisors (see below), whose sum is σ = 14331865573824. Its totient is φ = 11943221311500.

The previous prime is 13137543442657. The next prime is 13137543442669. The reversal of 13137543442661 is 16624434573131.

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.

It is a cyclic number.

It is not a de Polignac number, because 13137543442661 - 2² = 13137543442657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13137543442669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597161065565 + ... + 597161065586.

It is an arithmetic number, because the mean of its divisors is an integer number (3582966393456).

Almost surely, 2^{13137543442661} is an apocalyptic number.

13137543442661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13137543442661 is a deficient number, since it is larger than the sum of its proper divisors (1194322131163).

13137543442661 is a wasteful number, since it uses less digits than its factorization.

13137543442661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194322131162.

The product of its digits is 4354560, while the sum is 50.

The spelling of 13137543442661 in words is "thirteen trillion, one hundred thirty-seven billion, five hundred forty-three million, four hundred forty-two thousand, six hundred sixty-one".