251405116532 has 12 divisors (see below), whose sum is σ = 440489670180. Its totient is φ = 125550925056.

The previous prime is 251405116511. The next prime is 251405116553. The reversal of 251405116532 is 235611504152.

It is an interprime number because it is at equal distance from previous prime (251405116511) and next prime (251405116553).

It can be written as a sum of positive squares in 2 ways, for example, as 195077688976 + 56327427556 = 441676^2 + 237334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 251405116492 and 251405116501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37904573 + ... + 37911204.

It is an arithmetic number, because the mean of its divisors is an integer number (36707472515).

Almost surely, 2^251405116532 is an apocalyptic number.

It is an amenable number.

251405116532 is a deficient number, since it is larger than the sum of its proper divisors (189084553648).

251405116532 is a wasteful number, since it uses less digits than its factorization.

251405116532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75816610 (or 75816608 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 251405116532 in words is "two hundred fifty-one billion, four hundred five million, one hundred sixteen thousand, five hundred thirty-two".