2635138668 has 48 divisors (see below), whose sum is σ = 6321964544. Its totient is φ = 853675200.

The previous prime is 2635138657. The next prime is 2635138691. The reversal of 2635138668 is 8668315362.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 463821 + ... + 469467.

Almost surely, 2^2635138668 is an apocalyptic number.

It is an amenable number.

2635138668 is an abundant number, since it is smaller than the sum of its proper divisors (3686825876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2635138668 is a wasteful number, since it uses less digits than its factorization.

2635138668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742 (or 6740 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 2635138668 is about 51333.6017438870. The cubic root of 2635138668 is about 1381.2357949223.

The spelling of 2635138668 in words is "two billion, six hundred thirty-five million, one hundred thirty-eight thousand, six hundred sixty-eight".