253440136506 has 16 divisors (see below), whose sum is σ = 515471464800. Its totient is φ = 83048180208.

The previous prime is 253440136489. The next prime is 253440136511. The reversal of 253440136506 is 605631044352.

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, 357965941 + ... + 357966648.

It is an arithmetic number, because the mean of its divisors is an integer number (32216966550).

Almost surely, 2^253440136506 is an apocalyptic number.

253440136506 is an abundant number, since it is smaller than the sum of its proper divisors (262031328294).

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

253440136506 is a wasteful number, since it uses less digits than its factorization.

253440136506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715932653.

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 253440136506 in words is "two hundred fifty-three billion, four hundred forty million, one hundred thirty-six thousand, five hundred six".