2506631651 has 2 divisors, whose sum is σ = 2506631652. Its totient is φ = 2506631650.

The previous prime is 2506631591. The next prime is 2506631693. The reversal of 2506631651 is 1561366052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2506631651 - 2³⁰ = 1432889827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2506636651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253315825 + 1253315826.

It is an arithmetic number, because the mean of its divisors is an integer number (1253315826).

Almost surely, 2^2506631651 is an apocalyptic number.

2506631651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2506631651 is an equidigital number, since it uses as much as digits as its factorization.

2506631651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 2506631651 is about 50066.2725894389. The cubic root of 2506631651 is about 1358.4078200847.

The spelling of 2506631651 in words is "two billion, five hundred six million, six hundred thirty-one thousand, six hundred fifty-one".