645426530360 has 128 divisors (see below), whose sum is σ = 1518607552320. Its totient is φ = 246651236352.

The previous prime is 645426530321. The next prime is 645426530363. The reversal of 645426530360 is 63035624546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645426530363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24511922 + ... + 24538238.

Almost surely, 2^645426530360 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 645426530360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (759303776160).

645426530360 is an abundant number, since it is smaller than the sum of its proper divisors (873181021960).

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

645426530360 is a wasteful number, since it uses less digits than its factorization.

645426530360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26665 (or 26661 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 44.

The spelling of 645426530360 in words is "six hundred forty-five billion, four hundred twenty-six million, five hundred thirty thousand, three hundred sixty".