13561631653554 has 24 divisors (see below), whose sum is σ = 29383747922412. Its totient is φ = 4520511165600.

The previous prime is 13561631653529. The next prime is 13561631653561. The reversal of 13561631653554 is 45535613616531.

13561631653554 is a `hidden beast` number, since 1 + 3 + 5 + 6 + 1 + 6 + 31 + 6 + 53 + 554 = 666.

13561631653554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12347176961025 + 1214454692529 = 3513855^2 + 1102023^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13561631653554.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102297 + ... + 5209004.

Almost surely, 2^{13561631653554} is an apocalyptic number.

13561631653554 is an abundant number, since it is smaller than the sum of its proper divisors (15822116268858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13561631653554 is a wasteful number, since it uses less digits than its factorization.

13561631653554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5453162 (or 5453159 counting only the distinct ones).

The product of its digits is 14580000, while the sum is 54.

The spelling of 13561631653554 in words is "thirteen trillion, five hundred sixty-one billion, six hundred thirty-one million, six hundred fifty-three thousand, five hundred fifty-four".