253344026640 has 80 divisors (see below), whose sum is σ = 819512869248. Its totient is φ = 64621083648.

The previous prime is 253344026623. The next prime is 253344026653. The reversal of 253344026640 is 46620443352.

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

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, 22942309 + ... + 22953348.

Almost surely, 2^253344026640 is an apocalyptic number.

253344026640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253344026640 is an abundant number, since it is smaller than the sum of its proper divisors (566168842608).

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

253344026640 is a wasteful number, since it uses less digits than its factorization.

253344026640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45895696 (or 45895690 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 39.

Adding to 253344026640 its reverse (46620443352), we get a palindrome (299964469992).

The spelling of 253344026640 in words is "two hundred fifty-three billion, three hundred forty-four million, twenty-six thousand, six hundred forty".