136615864 has 64 divisors (see below), whose sum is σ = 321096960. Its totient is φ = 52938240.

The previous prime is 136615861. The next prime is 136615873. The reversal of 136615864 is 468516631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136615861) 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, 139344 + ... + 140320.

It is an arithmetic number, because the mean of its divisors is an integer number (5017140).

Almost surely, 2^136615864 is an apocalyptic number.

136615864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136615864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160548480).

136615864 is an abundant number, since it is smaller than the sum of its proper divisors (184481096).

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

136615864 is a wasteful number, since it uses less digits than its factorization.

136615864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228 (or 1224 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 136615864 is about 11688.2789152210. The cubic root of 136615864 is about 515.0314041239.

The spelling of 136615864 in words is "one hundred thirty-six million, six hundred fifteen thousand, eight hundred sixty-four".