136555551 has 28 divisors (see below), whose sum is σ = 223365480. Its totient is φ = 82756080.

The previous prime is 136555547. The next prime is 136555561. The reversal of 136555551 is 155555631.

It is not a de Polignac number, because 136555551 - 2² = 136555547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136555511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 496 + ... + 16533.

Almost surely, 2^136555551 is an apocalyptic number.

136555551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136555551 is a deficient number, since it is larger than the sum of its proper divisors (86809929).

136555551 is an equidigital number, since it uses as much as digits as its factorization.

136555551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17058 (or 17043 counting only the distinct ones).

The product of its digits is 56250, while the sum is 36.

The square root of 136555551 is about 11685.6985670520. The cubic root of 136555551 is about 514.9556011619.

The spelling of 136555551 in words is "one hundred thirty-six million, five hundred fifty-five thousand, five hundred fifty-one".