135656306499 has 24 divisors (see below), whose sum is σ = 210920232720. Its totient is φ = 77328324864.

The previous prime is 135656306491. The next prime is 135656306501. The reversal of 135656306499 is 994603656531.

It is not a de Polignac number, because 135656306499 - 2³ = 135656306491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135656306491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1068034 + ... + 1188279.

It is an arithmetic number, because the mean of its divisors is an integer number (8788343030).

Almost surely, 2^135656306499 is an apocalyptic number.

135656306499 is a deficient number, since it is larger than the sum of its proper divisors (75263926221).

135656306499 is a wasteful number, since it uses less digits than its factorization.

135656306499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256739 (or 2256732 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 57.

The spelling of 135656306499 in words is "one hundred thirty-five billion, six hundred fifty-six million, three hundred six thousand, four hundred ninety-nine".