645236662 has 8 divisors (see below), whose sum is σ = 1106120016. Its totient is φ = 276529992.

The previous prime is 645236659. The next prime is 645236677. The reversal of 645236662 is 266632546.

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

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 3 ways as a sum of consecutive naturals, for example, 23044153 + ... + 23044180.

It is an arithmetic number, because the mean of its divisors is an integer number (138265002).

Almost surely, 2^645236662 is an apocalyptic number.

645236662 is a deficient number, since it is larger than the sum of its proper divisors (460883354).

645236662 is a wasteful number, since it uses less digits than its factorization.

645236662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46088342.

The product of its digits is 311040, while the sum is 40.

The square root of 645236662 is about 25401.5090496608. The cubic root of 645236662 is about 864.1179206836.

The spelling of 645236662 in words is "six hundred forty-five million, two hundred thirty-six thousand, six hundred sixty-two".