136621545555 has 32 divisors (see below), whose sum is σ = 238565813760. Its totient is φ = 66213217280.

The previous prime is 136621545553. The next prime is 136621545581. The reversal of 136621545555 is 555545126631.

It is not a de Polignac number, because 136621545555 - 2¹ = 136621545553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136621545553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228931 + ... + 570659.

It is an arithmetic number, because the mean of its divisors is an integer number (7455181680).

Almost surely, 2^136621545555 is an apocalyptic number.

136621545555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

136621545555 is a deficient number, since it is larger than the sum of its proper divisors (101944268205).

136621545555 is a wasteful number, since it uses less digits than its factorization.

136621545555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344171.

The product of its digits is 2700000, while the sum is 48.

The spelling of 136621545555 in words is "one hundred thirty-six billion, six hundred twenty-one million, five hundred forty-five thousand, five hundred fifty-five".