2656161631 has 8 divisors (see below), whose sum is σ = 2688884640. Its totient is φ = 2623572192.

The previous prime is 2656161559. The next prime is 2656161637. The reversal of 2656161631 is 1361616562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2656161631 - 2¹⁵ = 2656128863 is a prime.

It is a super-2 number, since 2×2656161631² = 14110389219993160322, 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 (2656161637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6921 + ... + 73213.

It is an arithmetic number, because the mean of its divisors is an integer number (336110580).

Almost surely, 2^2656161631 is an apocalyptic number.

2656161631 is a deficient number, since it is larger than the sum of its proper divisors (32723009).

2656161631 is a wasteful number, since it uses less digits than its factorization.

2656161631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66785.

The product of its digits is 38880, while the sum is 37.

The square root of 2656161631 is about 51537.9630078644. The cubic root of 2656161631 is about 1384.8992060870.

The spelling of 2656161631 in words is "two billion, six hundred fifty-six million, one hundred sixty-one thousand, six hundred thirty-one".