136405775565 has 48 divisors (see below), whose sum is σ = 237283363200. Its totient is φ = 72489707136.

The previous prime is 136405775549. The next prime is 136405775603. The reversal of 136405775565 is 565577504631.

136405775565 is a `hidden beast` number, since 1 + 3 + 6 + 4 + 0 + 5 + 7 + 75 + 565 = 666.

It is not a de Polignac number, because 136405775565 - 2⁴ = 136405775549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15533346 + ... + 15542124.

It is an arithmetic number, because the mean of its divisors is an integer number (4943403400).

Almost surely, 2^136405775565 is an apocalyptic number.

136405775565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136405775565 is a deficient number, since it is larger than the sum of its proper divisors (100877587635).

136405775565 is a wasteful number, since it uses less digits than its factorization.

136405775565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9986 (or 9983 counting only the distinct ones).

The product of its (nonzero) digits is 13230000, while the sum is 54.

The spelling of 136405775565 in words is "one hundred thirty-six billion, four hundred five million, seven hundred seventy-five thousand, five hundred sixty-five".