645601503424 has 56 divisors (see below), whose sum is σ = 1355388510960. Its totient is φ = 304258784256.

The previous prime is 645601503413. The next prime is 645601503427. The reversal of 645601503424 is 424305106546.

It is not an unprimeable number, because it can be changed into a prime (645601503427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107967 + ... + 1587070.

Almost surely, 2^645601503424 is an apocalyptic number.

645601503424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

645601503424 is an abundant number, since it is smaller than the sum of its proper divisors (709787007536).

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

645601503424 is a wasteful number, since it uses less digits than its factorization.

645601503424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695265 (or 2695255 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 645601503424 in words is "six hundred forty-five billion, six hundred one million, five hundred three thousand, four hundred twenty-four".