645224094 has 24 divisors (see below), whose sum is σ = 1405716312. Its totient is φ = 213885360.

The previous prime is 645224089. The next prime is 645224141. The reversal of 645224094 is 490422546.

645224094 is a `hidden beast` number, since 6 + 4 + 522 + 40 + 94 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95764 + ... + 102279.

It is an arithmetic number, because the mean of its divisors is an integer number (58571513).

Almost surely, 2^645224094 is an apocalyptic number.

645224094 is an abundant number, since it is smaller than the sum of its proper divisors (760492218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645224094 is a wasteful number, since it uses less digits than its factorization.

645224094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198232 (or 198229 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 645224094 is about 25401.2616615789. The cubic root of 645224094 is about 864.1123101817.

The spelling of 645224094 in words is "six hundred forty-five million, two hundred twenty-four thousand, ninety-four".