13123561655 has 32 divisors (see below), whose sum is σ = 17062747200. Its totient is φ = 9653483520.

The previous prime is 13123561639. The next prime is 13123561681. The reversal of 13123561655 is 55616532131.

It is not a de Polignac number, because 13123561655 - 2⁴ = 13123561639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 764072 + ... + 781058.

It is an arithmetic number, because the mean of its divisors is an integer number (533210850).

Almost surely, 2^13123561655 is an apocalyptic number.

13123561655 is a deficient number, since it is larger than the sum of its proper divisors (3939185545).

13123561655 is a wasteful number, since it uses less digits than its factorization.

13123561655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17219.

The product of its digits is 81000, while the sum is 38.

The spelling of 13123561655 in words is "thirteen billion, one hundred twenty-three million, five hundred sixty-one thousand, six hundred fifty-five".