13661560231 has 8 divisors (see below), whose sum is σ = 15042806784. Its totient is φ = 12303528120.

The previous prime is 13661560201. The next prime is 13661560261. The reversal of 13661560231 is 13206516631.

It is an interprime number because it is at equal distance from previous prime (13661560201) and next prime (13661560261).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13661560231 - 2¹³ = 13661552039 is a prime.

It is a super-2 number, since 2×13661560231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661560201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5802375 + ... + 5804728.

It is an arithmetic number, because the mean of its divisors is an integer number (1880350848).

Almost surely, 2^13661560231 is an apocalyptic number.

13661560231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13661560231 is a deficient number, since it is larger than the sum of its proper divisors (1381246553).

13661560231 is a wasteful number, since it uses less digits than its factorization.

13661560231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11607221.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 13661560231 in words is "thirteen billion, six hundred sixty-one million, five hundred sixty thousand, two hundred thirty-one".