136015661 has 4 divisors (see below), whose sum is σ = 143174400. Its totient is φ = 128856924.

The previous prime is 136015639. The next prime is 136015667. The reversal of 136015661 is 166510631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136015661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136015667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3579341 + ... + 3579378.

It is an arithmetic number, because the mean of its divisors is an integer number (35793600).

Almost surely, 2^136015661 is an apocalyptic number.

It is an amenable number.

136015661 is a deficient number, since it is larger than the sum of its proper divisors (7158739).

136015661 is an equidigital number, since it uses as much as digits as its factorization.

136015661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7158738.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 136015661 is about 11662.5752301968. The cubic root of 136015661 is about 514.2760570019.

The spelling of 136015661 in words is "one hundred thirty-six million, fifteen thousand, six hundred sixty-one".