13214544561 has 24 divisors (see below), whose sum is σ = 20235947264. Its totient is φ = 8295086880.

The previous prime is 13214544559. The next prime is 13214544617. The reversal of 13214544561 is 16544541231.

13214544561 is a `hidden beast` number, since 1 + 32 + 14 + 54 + 4 + 561 = 666.

It is not a de Polignac number, because 13214544561 - 2¹ = 13214544559 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13214544661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 629731 + ... + 650376.

Almost surely, 2^13214544561 is an apocalyptic number.

It is an amenable number.

13214544561 is a deficient number, since it is larger than the sum of its proper divisors (7021402703).

13214544561 is a wasteful number, since it uses less digits than its factorization.

13214544561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280181 (or 1280178 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The spelling of 13214544561 in words is "thirteen billion, two hundred fourteen million, five hundred forty-four thousand, five hundred sixty-one".