251456810767 has 2 divisors, whose sum is σ = 251456810768. Its totient is φ = 251456810766.

The previous prime is 251456810749. The next prime is 251456810779. The reversal of 251456810767 is 767018654152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251456810767 is a prime.

It is a super-2 number, since 2×251456810767² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251456810797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125728405383 + 125728405384.

It is an arithmetic number, because the mean of its divisors is an integer number (125728405384).

Almost surely, 2^251456810767 is an apocalyptic number.

251456810767 is a deficient number, since it is larger than the sum of its proper divisors (1).

251456810767 is an equidigital number, since it uses as much as digits as its factorization.

251456810767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 251456810767 in words is "two hundred fifty-one billion, four hundred fifty-six million, eight hundred ten thousand, seven hundred sixty-seven".