645463330 has 16 divisors (see below), whose sum is σ = 1162149120. Its totient is φ = 258115312.

The previous prime is 645463277. The next prime is 645463339. The reversal of 645463330 is 33364546.

It is not an unprimeable number, because it can be changed into a prime (645463339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46677 + ... + 58903.

It is an arithmetic number, because the mean of its divisors is an integer number (72634320).

Almost surely, 2^645463330 is an apocalyptic number.

645463330 is a deficient number, since it is larger than the sum of its proper divisors (516685790).

645463330 is a wasteful number, since it uses less digits than its factorization.

645463330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17513.

The product of its (nonzero) digits is 77760, while the sum is 34.

The square root of 645463330 is about 25405.9703613147. The cubic root of 645463330 is about 864.2190954210.

It can be divided in two parts, 64546 and 3330, that added together give a palindrome (67876).

The spelling of 645463330 in words is "six hundred forty-five million, four hundred sixty-three thousand, three hundred thirty".