645415004345 has 64 divisors (see below), whose sum is σ = 862395724800. Its totient is φ = 461662064640.

The previous prime is 645415004329. The next prime is 645415004393. The reversal of 645415004345 is 543400514546.

It is not a de Polignac number, because 645415004345 - 2⁴ = 645415004329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 121842737 + ... + 121848033.

It is an arithmetic number, because the mean of its divisors is an integer number (13474933200).

Almost surely, 2^645415004345 is an apocalyptic number.

It is an amenable number.

645415004345 is a deficient number, since it is larger than the sum of its proper divisors (216980720455).

645415004345 is a wasteful number, since it uses less digits than its factorization.

645415004345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6338.

The product of its (nonzero) digits is 576000, while the sum is 41.

The spelling of 645415004345 in words is "six hundred forty-five billion, four hundred fifteen million, four thousand, three hundred forty-five".