251422661463 has 32 divisors (see below), whose sum is σ = 355757875200. Its totient is φ = 157681122816.

The previous prime is 251422661383. The next prime is 251422661507. The reversal of 251422661463 is 364166224152.

It is a happy number.

It is not a de Polignac number, because 251422661463 - 2¹⁰ = 251422660439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251422661263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773983 + ... + 1049711.

It is an arithmetic number, because the mean of its divisors is an integer number (11117433600).

Almost surely, 2^251422661463 is an apocalyptic number.

251422661463 is a deficient number, since it is larger than the sum of its proper divisors (104335213737).

251422661463 is a wasteful number, since it uses less digits than its factorization.

251422661463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276031.

The product of its digits is 414720, while the sum is 42.

The spelling of 251422661463 in words is "two hundred fifty-one billion, four hundred twenty-two million, six hundred sixty-one thousand, four hundred sixty-three".