136551521655 has 80 divisors (see below), whose sum is σ = 246783708864. Its totient is φ = 72233441280.

The previous prime is 136551521641. The next prime is 136551521683. The reversal of 136551521655 is 556125155631.

136551521655 is a `hidden beast` number, since 1 + 3 + 65 + 5 + 1 + 521 + 65 + 5 = 666.

It is not a de Polignac number, because 136551521655 - 2⁹ = 136551521143 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 136551521655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 42791110 + ... + 42794300.

Almost surely, 2^136551521655 is an apocalyptic number.

136551521655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

136551521655 is a deficient number, since it is larger than the sum of its proper divisors (110232187209).

136551521655 is a wasteful number, since it uses less digits than its factorization.

136551521655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038 (or 4029 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The spelling of 136551521655 in words is "one hundred thirty-six billion, five hundred fifty-one million, five hundred twenty-one thousand, six hundred fifty-five".