645121314 has 32 divisors (see below), whose sum is σ = 1434555840. Its totient is φ = 214897536.

The previous prime is 645121291. The next prime is 645121331. The reversal of 645121314 is 413121546.

It is a happy number.

645121314 is a `hidden beast` number, since 645 + 1 + 2 + 1 + 3 + 14 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105957 + ... + 111879.

It is an arithmetic number, because the mean of its divisors is an integer number (44829870).

Almost surely, 2^645121314 is an apocalyptic number.

645121314 is an abundant number, since it is smaller than the sum of its proper divisors (789434526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645121314 is a wasteful number, since it uses less digits than its factorization.

645121314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7951 (or 7945 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 645121314 is about 25399.2384531505. The cubic root of 645121314 is about 864.0664252557.

The spelling of 645121314 in words is "six hundred forty-five million, one hundred twenty-one thousand, three hundred fourteen".