6135905644 has 18 divisors (see below), whose sum is σ = 11802745052. Its totient is φ = 2789047800.

The previous prime is 6135905639. The next prime is 6135905653. The reversal of 6135905644 is 4465095316.

It is a self number, because there is not a number n which added to its sum of digits gives 6135905644.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6338262 + ... + 6339229.

Almost surely, 2^6135905644 is an apocalyptic number.

It is an amenable number.

6135905644 is a deficient number, since it is larger than the sum of its proper divisors (5666839408).

6135905644 is a wasteful number, since it uses less digits than its factorization.

6135905644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12677517 (or 12677504 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 6135905644 is about 78332.0218301558. The cubic root of 6135905644 is about 1830.7381182422.

The spelling of 6135905644 in words is "six billion, one hundred thirty-five million, nine hundred five thousand, six hundred forty-four".