251264525316 has 48 divisors (see below), whose sum is σ = 670069822464. Its totient is φ = 71786533536.

The previous prime is 251264525287. The next prime is 251264525321. The reversal of 251264525316 is 613525462152.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2185321 + ... + 2297423.

It is an arithmetic number, because the mean of its divisors is an integer number (13959787968).

Almost surely, 2^251264525316 is an apocalyptic number.

It is an amenable number.

251264525316 is an abundant number, since it is smaller than the sum of its proper divisors (418805297148).

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

251264525316 is a wasteful number, since it uses less digits than its factorization.

251264525316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138800 (or 138798 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

Adding to 251264525316 its reverse (613525462152), we get a palindrome (864789987468).

The spelling of 251264525316 in words is "two hundred fifty-one billion, two hundred sixty-four million, five hundred twenty-five thousand, three hundred sixteen".