645644231360 has 112 divisors (see below), whose sum is σ = 1606118582016. Its totient is φ = 246746852352.

The previous prime is 645644231317. The next prime is 645644231431. The reversal of 645644231360 is 63132446546.

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, 6449207 + ... + 6548553.

Almost surely, 2^645644231360 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645644231360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803059291008).

645644231360 is an abundant number, since it is smaller than the sum of its proper divisors (960474350656).

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

645644231360 is a wasteful number, since it uses less digits than its factorization.

645644231360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100270 (or 100260 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

It can be divided in two parts, 64564 and 4231360, that added together give a palindrome (4295924).

The spelling of 645644231360 in words is "six hundred forty-five billion, six hundred forty-four million, two hundred thirty-one thousand, three hundred sixty".