251773587012 has 96 divisors (see below), whose sum is σ = 615353760000. Its totient is φ = 80016369664.

The previous prime is 251773587011. The next prime is 251773587089. The reversal of 251773587012 is 210785377152.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (251773587011) 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 31 ways as a sum of consecutive naturals, for example, 25980664 + ... + 25990352.

It is an arithmetic number, because the mean of its divisors is an integer number (6409935000).

Almost surely, 2^251773587012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251773587012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307676880000).

251773587012 is an abundant number, since it is smaller than the sum of its proper divisors (363580172988).

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

251773587012 is a wasteful number, since it uses less digits than its factorization.

251773587012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10653 (or 10651 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 48.

The spelling of 251773587012 in words is "two hundred fifty-one billion, seven hundred seventy-three million, five hundred eighty-seven thousand, twelve".