2551640633 has 2 divisors, whose sum is σ = 2551640634. Its totient is φ = 2551640632.

The previous prime is 2551640627. The next prime is 2551640647. The reversal of 2551640633 is 3360461552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1626750889 + 924889744 = 40333^2 + 30412^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551640633 - 2⁶ = 2551640569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2551640593 and 2551640602.

It is not a weakly prime, because it can be changed into another prime (2551640233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275820316 + 1275820317.

It is an arithmetic number, because the mean of its divisors is an integer number (1275820317).

Almost surely, 2^2551640633 is an apocalyptic number.

It is an amenable number.

2551640633 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551640633 is an equidigital number, since it uses as much as digits as its factorization.

2551640633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 2551640633 is about 50513.7667670903. The cubic root of 2551640633 is about 1366.4901423864.

The spelling of 2551640633 in words is "two billion, five hundred fifty-one million, six hundred forty thousand, six hundred thirty-three".