13661256323 has 16 divisors (see below), whose sum is σ = 16052912736. Its totient is φ = 11461616640.

The previous prime is 13661256319. The next prime is 13661256353. The reversal of 13661256323 is 32365216631.

It is a cyclic number.

It is not a de Polignac number, because 13661256323 - 2² = 13661256319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13661256313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188761 + ... + 1200197.

It is an arithmetic number, because the mean of its divisors is an integer number (1003307046).

Almost surely, 2^13661256323 is an apocalyptic number.

13661256323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13661256323 is a deficient number, since it is larger than the sum of its proper divisors (2391656413).

13661256323 is a wasteful number, since it uses less digits than its factorization.

13661256323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19814.

The product of its digits is 116640, while the sum is 38.

The spelling of 13661256323 in words is "thirteen billion, six hundred sixty-one million, two hundred fifty-six thousand, three hundred twenty-three".