6135656121 has 80 divisors (see below), whose sum is σ = 11186672640. Its totient is φ = 3275717760.

The previous prime is 6135656113. The next prime is 6135656123. The reversal of 6135656121 is 1216565316.

6135656121 is a `hidden beast` number, since 6 + 1 + 35 + 6 + 5 + 612 + 1 = 666.

It is not a de Polignac number, because 6135656121 - 2³ = 6135656113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6135656123) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 503715 + ... + 515751.

It is an arithmetic number, because the mean of its divisors is an integer number (139833408).

Almost surely, 2^6135656121 is an apocalyptic number.

It is an amenable number.

6135656121 is a deficient number, since it is larger than the sum of its proper divisors (5051016519).

6135656121 is a wasteful number, since it uses less digits than its factorization.

6135656121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12116 (or 12107 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 6135656121 is about 78330.4290872966. The cubic root of 6135656121 is about 1830.7133016144.

The spelling of 6135656121 in words is "six billion, one hundred thirty-five million, six hundred fifty-six thousand, one hundred twenty-one".