253918535424 has 72 divisors (see below), whose sum is σ = 679840613760. Its totient is φ = 84132645888.

The previous prime is 253918535411. The next prime is 253918535447. The reversal of 253918535424 is 424535819352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861634 + ... + 1118145.

Almost surely, 2^253918535424 is an apocalyptic number.

253918535424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

253918535424 is an abundant number, since it is smaller than the sum of its proper divisors (425922078336).

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

253918535424 is a wasteful number, since it uses less digits than its factorization.

253918535424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979965 (or 1979951 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 51.

The spelling of 253918535424 in words is "two hundred fifty-three billion, nine hundred eighteen million, five hundred thirty-five thousand, four hundred twenty-four".