251943962960 has 20 divisors (see below), whose sum is σ = 585769714068. Its totient is φ = 100777585152.

The previous prime is 251943962953. The next prime is 251943962993. The reversal of 251943962960 is 69269349152.

It can be written as a sum of positive squares in 2 ways, for example, as 35465928976 + 216478033984 = 188324^2 + 465272^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 251943962896 and 251943962905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574649689 + ... + 1574649848.

Almost surely, 2^251943962960 is an apocalyptic number.

251943962960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251943962960 is an abundant number, since it is smaller than the sum of its proper divisors (333825751108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251943962960 is a wasteful number, since it uses less digits than its factorization.

251943962960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149299550 (or 3149299544 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 56.

The spelling of 251943962960 in words is "two hundred fifty-one billion, nine hundred forty-three million, nine hundred sixty-two thousand, nine hundred sixty".