645334610 has 8 divisors (see below), whose sum is σ = 1161602316. Its totient is φ = 258133840.

The previous prime is 645334607. The next prime is 645334631. The reversal of 645334610 is 16433546.

It can be written as a sum of positive squares in 2 ways, for example, as 645312409 + 22201 = 25403^2 + 149^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32266721 + ... + 32266740.

Almost surely, 2^645334610 is an apocalyptic number.

645334610 is a deficient number, since it is larger than the sum of its proper divisors (516267706).

645334610 is a wasteful number, since it uses less digits than its factorization.

645334610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64533468.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 645334610 is about 25403.4369721894. The cubic root of 645334610 is about 864.1616433178.

The spelling of 645334610 in words is "six hundred forty-five million, three hundred thirty-four thousand, six hundred ten".