645030974 has 16 divisors (see below), whose sum is σ = 1106505600. Its totient is φ = 276257304.

The previous prime is 645030973. The next prime is 645031039. The reversal of 645030974 is 479030546.

645030974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645030973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7517 + ... + 36695.

It is an arithmetic number, because the mean of its divisors is an integer number (69156600).

Almost surely, 2^645030974 is an apocalyptic number.

645030974 is a deficient number, since it is larger than the sum of its proper divisors (461474626).

645030974 is a wasteful number, since it uses less digits than its factorization.

645030974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30767.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 645030974 is about 25397.4599911093. The cubic root of 645030974 is about 864.0260899972.

The spelling of 645030974 in words is "six hundred forty-five million, thirty thousand, nine hundred seventy-four".