253645440630 has 64 divisors (see below), whose sum is σ = 613019404800. Its totient is φ = 67164652800.

The previous prime is 253645440617. The next prime is 253645440647. The reversal of 253645440630 is 36044546352.

It is a happy number.

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, 13440141 + ... + 13458999.

It is an arithmetic number, because the mean of its divisors is an integer number (9578428200).

Almost surely, 2^253645440630 is an apocalyptic number.

253645440630 is an abundant number, since it is smaller than the sum of its proper divisors (359373964170).

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

253645440630 is a wasteful number, since it uses less digits than its factorization.

253645440630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21989.

The product of its (nonzero) digits is 1036800, while the sum is 42.

Adding to 253645440630 its reverse (36044546352), we get a palindrome (289689986982).

The spelling of 253645440630 in words is "two hundred fifty-three billion, six hundred forty-five million, four hundred forty thousand, six hundred thirty".