2551834661 has 2 divisors, whose sum is σ = 2551834662. Its totient is φ = 2551834660.

The previous prime is 2551834639. The next prime is 2551834679. The reversal of 2551834661 is 1664381552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2520642436 + 31192225 = 50206^2 + 5585^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551834661 - 2¹⁴ = 2551818277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551834261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275917330 + 1275917331.

It is an arithmetic number, because the mean of its divisors is an integer number (1275917331).

Almost surely, 2^2551834661 is an apocalyptic number.

It is an amenable number.

2551834661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551834661 is an equidigital number, since it uses as much as digits as its factorization.

2551834661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 41.

The square root of 2551834661 is about 50515.6872763303. The cubic root of 2551834661 is about 1366.5247777012.

The spelling of 2551834661 in words is "two billion, five hundred fifty-one million, eight hundred thirty-four thousand, six hundred sixty-one".