645141394 has 8 divisors (see below), whose sum is σ = 968267520. Its totient is φ = 322385556.

The previous prime is 645141389. The next prime is 645141401. The reversal of 645141394 is 493141546.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88174 + ... + 95209.

It is an arithmetic number, because the mean of its divisors is an integer number (121033440).

Almost surely, 2^645141394 is an apocalyptic number.

645141394 is a deficient number, since it is larger than the sum of its proper divisors (323126126).

645141394 is a wasteful number, since it uses less digits than its factorization.

645141394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185144.

The product of its digits is 51840, while the sum is 37.

The square root of 645141394 is about 25399.6337375168. The cubic root of 645141394 is about 864.0753901193.

The spelling of 645141394 in words is "six hundred forty-five million, one hundred forty-one thousand, three hundred ninety-four".