2631164561 has 16 divisors (see below), whose sum is σ = 2697611904. Its totient is φ = 2565817344.

The previous prime is 2631164533. The next prime is 2631164563. The reversal of 2631164561 is 1654611362.

It is not a de Polignac number, because 2631164561 - 2²² = 2626970257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2631164563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2126435 + ... + 2127671.

It is an arithmetic number, because the mean of its divisors is an integer number (168600744).

Almost surely, 2^2631164561 is an apocalyptic number.

It is an amenable number.

2631164561 is a deficient number, since it is larger than the sum of its proper divisors (66447343).

2631164561 is a wasteful number, since it uses less digits than its factorization.

2631164561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640.

The product of its digits is 25920, while the sum is 35.

The square root of 2631164561 is about 51294.8785065332. The cubic root of 2631164561 is about 1380.5410888371.

The spelling of 2631164561 in words is "two billion, six hundred thirty-one million, one hundred sixty-four thousand, five hundred sixty-one".