13561164 has 18 divisors (see below), whose sum is σ = 34279700. Its totient is φ = 4520376.

The previous prime is 13561157. The next prime is 13561199. The reversal of 13561164 is 46116531.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-4 number, since 4×13561164⁴ (a number of 30 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188314 + ... + 188385.

Almost surely, 2^13561164 is an apocalyptic number.

It is an amenable number.

13561164 is an abundant number, since it is smaller than the sum of its proper divisors (20718536).

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

13561164 is a wasteful number, since it uses less digits than its factorization.

13561164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376709 (or 376704 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 13561164 is about 3682.5485740177. The cubic root of 13561164 is about 238.4692153349.

Adding to 13561164 its reverse (46116531), we get a palindrome (59677695).

The spelling of 13561164 in words is "thirteen million, five hundred sixty-one thousand, one hundred sixty-four".