251545210660 has 48 divisors (see below), whose sum is σ = 542257220736. Its totient is φ = 97964036352.

The previous prime is 251545210627. The next prime is 251545210669. The reversal of 251545210660 is 66012545152.

It is not an unprimeable number, because it can be changed into a prime (251545210669) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 198064 + ... + 736423.

It is an arithmetic number, because the mean of its divisors is an integer number (11297025432).

Almost surely, 2^251545210660 is an apocalyptic number.

251545210660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251545210660 is an abundant number, since it is smaller than the sum of its proper divisors (290712010076).

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

251545210660 is a wasteful number, since it uses less digits than its factorization.

251545210660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934852 (or 934850 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 251545210660 in words is "two hundred fifty-one billion, five hundred forty-five million, two hundred ten thousand, six hundred sixty".