645043366 has 8 divisors (see below), whose sum is σ = 1055525544. Its totient is φ = 293201520.

The previous prime is 645043363. The next prime is 645043379. The reversal of 645043366 is 663340546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645043363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14660055 + ... + 14660098.

It is an arithmetic number, because the mean of its divisors is an integer number (131940693).

Almost surely, 2^645043366 is an apocalyptic number.

645043366 is a deficient number, since it is larger than the sum of its proper divisors (410482178).

645043366 is a wasteful number, since it uses less digits than its factorization.

645043366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29320166.

The product of its (nonzero) digits is 155520, while the sum is 37.

The square root of 645043366 is about 25397.7039513417. The cubic root of 645043366 is about 864.0316230352.

The spelling of 645043366 in words is "six hundred forty-five million, forty-three thousand, three hundred sixty-six".