253281931644 has 96 divisors (see below), whose sum is σ = 696704135680. Its totient is φ = 70102755072.

The previous prime is 253281931633. The next prime is 253281931657. The reversal of 253281931644 is 446139182352.

It is a junction number, because it is equal to n+sod(n) for n = 253281931593 and 253281931602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 533799 + ... + 889665.

Almost surely, 2^253281931644 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 253281931644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348352067840).

253281931644 is an abundant number, since it is smaller than the sum of its proper divisors (443422204036).

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

253281931644 is a wasteful number, since it uses less digits than its factorization.

253281931644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356147 (or 356145 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The spelling of 253281931644 in words is "two hundred fifty-three billion, two hundred eighty-one million, nine hundred thirty-one thousand, six hundred forty-four".