645634344630 has 48 divisors (see below), whose sum is σ = 1703194082352. Its totient is φ = 156517416000.

The previous prime is 645634344629. The next prime is 645634344653. The reversal of 645634344630 is 36443436546.

645634344630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 645634344630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88926721 + ... + 88933980.

It is an arithmetic number, because the mean of its divisors is an integer number (35483210049).

Almost surely, 2^645634344630 is an apocalyptic number.

645634344630 is an abundant number, since it is smaller than the sum of its proper divisors (1057559737722).

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

645634344630 is a wasteful number, since it uses less digits than its factorization.

645634344630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177860733 (or 177860722 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 48.

The spelling of 645634344630 in words is "six hundred forty-five billion, six hundred thirty-four million, three hundred forty-four thousand, six hundred thirty".