645250314624 has 32 divisors (see below), whose sum is σ = 1713946149240. Its totient is φ = 215083438080.

The previous prime is 645250314601. The next prime is 645250314689. The reversal of 645250314624 is 426413052546.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×645250314624² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840169297 + ... + 840170064.

Almost surely, 2^645250314624 is an apocalyptic number.

645250314624 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

645250314624 is an abundant number, since it is smaller than the sum of its proper divisors (1068695834616).

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

645250314624 is a wasteful number, since it uses less digits than its factorization.

645250314624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680339378 (or 1680339366 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 645250314624 in words is "six hundred forty-five billion, two hundred fifty million, three hundred fourteen thousand, six hundred twenty-four".