251943962953 has 2 divisors, whose sum is σ = 251943962954. Its totient is φ = 251943962952.

The previous prime is 251943962923. The next prime is 251943962993. The reversal of 251943962953 is 359269349152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150751263289 + 101192699664 = 388267^2 + 318108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251943962953 is a prime.

It is not a weakly prime, because it can be changed into another prime (251943962923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125971981476 + 125971981477.

It is an arithmetic number, because the mean of its divisors is an integer number (125971981477).

Almost surely, 2^251943962953 is an apocalyptic number.

It is an amenable number.

251943962953 is a deficient number, since it is larger than the sum of its proper divisors (1).

251943962953 is an equidigital number, since it uses as much as digits as its factorization.

251943962953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15746400, while the sum is 58.

The spelling of 251943962953 in words is "two hundred fifty-one billion, nine hundred forty-three million, nine hundred sixty-two thousand, nine hundred fifty-three".