251865820468 has 48 divisors (see below), whose sum is σ = 466808025600. Its totient is φ = 118711353600.

The previous prime is 251865820463. The next prime is 251865820501. The reversal of 251865820468 is 864028568152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251865820463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2173393 + ... + 2286343.

It is an arithmetic number, because the mean of its divisors is an integer number (9725167200).

Almost surely, 2^251865820468 is an apocalyptic number.

It is an amenable number.

251865820468 is a deficient number, since it is larger than the sum of its proper divisors (214942205132).

251865820468 is a wasteful number, since it uses less digits than its factorization.

251865820468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113440 (or 113438 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 55.

The spelling of 251865820468 in words is "two hundred fifty-one billion, eight hundred sixty-five million, eight hundred twenty thousand, four hundred sixty-eight".