645782602 has 32 divisors (see below), whose sum is σ = 1037836800. Its totient is φ = 300494448.

The previous prime is 645782593. The next prime is 645782611. The reversal of 645782602 is 206287546.

It is an interprime number because it is at equal distance from previous prime (645782593) and next prime (645782611).

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 15 ways as a sum of consecutive naturals, for example, 543453 + ... + 544639.

It is an arithmetic number, because the mean of its divisors is an integer number (32432400).

Almost surely, 2^645782602 is an apocalyptic number.

645782602 is a deficient number, since it is larger than the sum of its proper divisors (392054198).

645782602 is a wasteful number, since it uses less digits than its factorization.

645782602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 645782602 is about 25412.2529894537. The cubic root of 645782602 is about 864.3615643860.

The spelling of 645782602 in words is "six hundred forty-five million, seven hundred eighty-two thousand, six hundred two".