645214370 has 32 divisors (see below), whose sum is σ = 1175428800. Its totient is φ = 254984256.

The previous prime is 645214363. The next prime is 645214373. The reversal of 645214370 is 73412546.

It is not an unprimeable number, because it can be changed into a prime (645214373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317297 + ... + 319323.

It is an arithmetic number, because the mean of its divisors is an integer number (36732150).

Almost surely, 2^645214370 is an apocalyptic number.

645214370 is a deficient number, since it is larger than the sum of its proper divisors (530214430).

645214370 is a wasteful number, since it uses less digits than its factorization.

645214370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 645214370 is about 25401.0702530425. The cubic root of 645214370 is about 864.1079692246.

The spelling of 645214370 in words is "six hundred forty-five million, two hundred fourteen thousand, three hundred seventy".