645411193 has 12 divisors (see below), whose sum is σ = 756523152. Its totient is φ = 548981160.

The previous prime is 645411187. The next prime is 645411199. The reversal of 645411193 is 391114546.

645411193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (645411187) and next prime (645411199).

It is not a de Polignac number, because 645411193 - 2⁹ = 645410681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645411199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43855 + ... + 56692.

It is an arithmetic number, because the mean of its divisors is an integer number (63043596).

Almost surely, 2^645411193 is an apocalyptic number.

It is an amenable number.

645411193 is a deficient number, since it is larger than the sum of its proper divisors (111111959).

645411193 is a wasteful number, since it uses less digits than its factorization.

645411193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100692 (or 100685 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 645411193 is about 25404.9442628792. The cubic root of 645411193 is about 864.1958258294.

The spelling of 645411193 in words is "six hundred forty-five million, four hundred eleven thousand, one hundred ninety-three".