136863561 has 16 divisors (see below), whose sum is σ = 184733120. Its totient is φ = 90123840.

The previous prime is 136863541. The next prime is 136863563. The reversal of 136863561 is 165368631.

136863561 = 176² + 177² + ... + 746².

It is not a de Polignac number, because 136863561 - 2⁶ = 136863497 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136863563) 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, 186351 + ... + 187083.

It is an arithmetic number, because the mean of its divisors is an integer number (11545820).

Almost surely, 2^136863561 is an apocalyptic number.

It is an amenable number.

136863561 is a deficient number, since it is larger than the sum of its proper divisors (47869559).

136863561 is a wasteful number, since it uses less digits than its factorization.

136863561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416.

The product of its digits is 77760, while the sum is 39.

The square root of 136863561 is about 11698.8700736439. The cubic root of 136863561 is about 515.3424824711.

The spelling of 136863561 in words is "one hundred thirty-six million, eight hundred sixty-three thousand, five hundred sixty-one".