136621545615 has 32 divisors (see below), whose sum is σ = 242917732800. Its totient is φ = 72854328960.

The previous prime is 136621545581. The next prime is 136621545617. The reversal of 136621545615 is 516545126631.

136621545615 is a `hidden beast` number, since 1 + 3 + 6 + 6 + 21 + 5 + 4 + 5 + 615 = 666.

It is not a de Polignac number, because 136621545615 - 2²⁶ = 136554436751 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136621545617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 917485 + ... + 1055945.

It is an arithmetic number, because the mean of its divisors is an integer number (7591179150).

Almost surely, 2^136621545615 is an apocalyptic number.

136621545615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

136621545615 is a deficient number, since it is larger than the sum of its proper divisors (106296187185).

136621545615 is a wasteful number, since it uses less digits than its factorization.

136621545615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145784 (or 145778 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 136621545615 in words is "one hundred thirty-six billion, six hundred twenty-one million, five hundred forty-five thousand, six hundred fifteen".