136564815 has 8 divisors (see below), whose sum is σ = 218503728. Its totient is φ = 72834560.

The previous prime is 136564807. The next prime is 136564829. The reversal of 136564815 is 518465631.

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

It is not a de Polignac number, because 136564815 - 2³ = 136564807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4552146 + ... + 4552175.

It is an arithmetic number, because the mean of its divisors is an integer number (27312966).

Almost surely, 2^136564815 is an apocalyptic number.

136564815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

136564815 is a deficient number, since it is larger than the sum of its proper divisors (81938913).

136564815 is an equidigital number, since it uses as much as digits as its factorization.

136564815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9104329.

The product of its digits is 86400, while the sum is 39.

The square root of 136564815 is about 11686.0949422808. The cubic root of 136564815 is about 514.9672458510.

The spelling of 136564815 in words is "one hundred thirty-six million, five hundred sixty-four thousand, eight hundred fifteen".