253512022243440 has 80 divisors (see below), whose sum is σ = 793232009866368. Its totient is φ = 66971400261888.

The previous prime is 253512022243421. The next prime is 253512022243453. The reversal of 253512022243440 is 44342220215352.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4935956062 + ... + 4936007421.

Almost surely, 2^{253512022243440} is an apocalyptic number.

253512022243440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253512022243440 is an abundant number, since it is smaller than the sum of its proper divisors (539719987622928).

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

253512022243440 is a wasteful number, since it uses less digits than its factorization.

253512022243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9871963606 (or 9871963600 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 39.

Adding to 253512022243440 its reverse (44342220215352), we get a palindrome (297854242458792).

The spelling of 253512022243440 in words is "two hundred fifty-three trillion, five hundred twelve billion, twenty-two million, two hundred forty-three thousand, four hundred forty".