645800106548 has 48 divisors (see below), whose sum is σ = 1198525809600. Its totient is φ = 303619518720.

The previous prime is 645800106533. The next prime is 645800106577. The reversal of 645800106548 is 845601008546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53627408 + ... + 53639448.

It is an arithmetic number, because the mean of its divisors is an integer number (24969287700).

Almost surely, 2^645800106548 is an apocalyptic number.

It is an amenable number.

645800106548 is a deficient number, since it is larger than the sum of its proper divisors (552725703052).

645800106548 is a wasteful number, since it uses less digits than its factorization.

645800106548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17280 (or 17278 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 645800106548 in words is "six hundred forty-five billion, eight hundred million, one hundred six thousand, five hundred forty-eight".