2661795631 has 12 divisors (see below), whose sum is σ = 2969452696. Its totient is φ = 2383690320.

The previous prime is 2661795629. The next prime is 2661795659. The reversal of 2661795631 is 1365971662.

It is not a de Polignac number, because 2661795631 - 2¹ = 2661795629 is a prime.

It is a super-2 number, since 2×2661795631² = 14170311962421376322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661795601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156060 + ... + 172273.

Almost surely, 2^2661795631 is an apocalyptic number.

2661795631 is a deficient number, since it is larger than the sum of its proper divisors (307657065).

2661795631 is a wasteful number, since it uses less digits than its factorization.

2661795631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328422 (or 328411 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The square root of 2661795631 is about 51592.5927919890. The cubic root of 2661795631 is about 1385.8776871991.

The spelling of 2661795631 in words is "two billion, six hundred sixty-one million, seven hundred ninety-five thousand, six hundred thirty-one".