645703602 has 16 divisors (see below), whose sum is σ = 1293009312. Its totient is φ = 214967520.

The previous prime is 645703573. The next prime is 645703627. The reversal of 645703602 is 206307546.

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 7 ways as a sum of consecutive naturals, for example, 61483 + ... + 71214.

It is an arithmetic number, because the mean of its divisors is an integer number (80813082).

Almost surely, 2^645703602 is an apocalyptic number.

645703602 is an abundant number, since it is smaller than the sum of its proper divisors (647305710).

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

645703602 is a wasteful number, since it uses less digits than its factorization.

645703602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133513.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 645703602 is about 25410.6985736323. The cubic root of 645703602 is about 864.3263165343.

The spelling of 645703602 in words is "six hundred forty-five million, seven hundred three thousand, six hundred two".