251630634060 has 72 divisors (see below), whose sum is σ = 821993412240. Its totient is φ = 61939847808.

The previous prime is 251630634007. The next prime is 251630634061. The reversal of 251630634060 is 60436036152.

251630634060 is a `hidden beast` number, since 2 + 5 + 1 + 6 + 306 + 340 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (251630634061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53764890 + ... + 53769569.

It is an arithmetic number, because the mean of its divisors is an integer number (11416575170).

Almost surely, 2^251630634060 is an apocalyptic number.

251630634060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251630634060 is an abundant number, since it is smaller than the sum of its proper divisors (570362778180).

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

251630634060 is a wasteful number, since it uses less digits than its factorization.

251630634060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107534487 (or 107534482 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 251630634060 in words is "two hundred fifty-one billion, six hundred thirty million, six hundred thirty-four thousand, sixty".