645157214 has 8 divisors (see below), whose sum is σ = 1042177080. Its totient is φ = 297764856.

The previous prime is 645157207. The next prime is 645157237. The reversal of 645157214 is 412751546.

645157214 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12406844 + ... + 12406895.

It is an arithmetic number, because the mean of its divisors is an integer number (130272135).

Almost surely, 2^645157214 is an apocalyptic number.

645157214 is a deficient number, since it is larger than the sum of its proper divisors (397019866).

645157214 is a wasteful number, since it uses less digits than its factorization.

645157214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24813754.

The product of its digits is 33600, while the sum is 35.

The square root of 645157214 is about 25399.9451574211. The cubic root of 645157214 is about 864.0824529436.

The spelling of 645157214 in words is "six hundred forty-five million, one hundred fifty-seven thousand, two hundred fourteen".