2631464861 has 2 divisors, whose sum is σ = 2631464862. Its totient is φ = 2631464860.

The previous prime is 2631464839. The next prime is 2631464879. The reversal of 2631464861 is 1684641362.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1387562500 + 1243902361 = 37250^2 + 35269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2631464861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2631460861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315732430 + 1315732431.

It is an arithmetic number, because the mean of its divisors is an integer number (1315732431).

Almost surely, 2^2631464861 is an apocalyptic number.

It is an amenable number.

2631464861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2631464861 is an equidigital number, since it uses as much as digits as its factorization.

2631464861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The square root of 2631464861 is about 51297.8056158351. The cubic root of 2631464861 is about 1380.5936081314.

The spelling of 2631464861 in words is "two billion, six hundred thirty-one million, four hundred sixty-four thousand, eight hundred sixty-one".