645033308 has 6 divisors (see below), whose sum is σ = 1128808296. Its totient is φ = 322516652.

The previous prime is 645033289. The next prime is 645033331. The reversal of 645033308 is 803330546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80629160 + ... + 80629167.

It is an arithmetic number, because the mean of its divisors is an integer number (188134716).

Almost surely, 2^645033308 is an apocalyptic number.

It is an amenable number.

645033308 is a deficient number, since it is larger than the sum of its proper divisors (483774988).

645033308 is a wasteful number, since it uses less digits than its factorization.

645033308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161258331 (or 161258329 counting only the distinct ones).

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

The square root of 645033308 is about 25397.5059405446. The cubic root of 645033308 is about 864.0271321355.

The spelling of 645033308 in words is "six hundred forty-five million, thirty-three thousand, three hundred eight".