645014888 has 64 divisors (see below), whose sum is σ = 1460592000. Its totient is φ = 260865792.

The previous prime is 645014863. The next prime is 645014957. The reversal of 645014888 is 888410546.

It is an unprimeable number.

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, 310718 + ... + 312786.

It is an arithmetic number, because the mean of its divisors is an integer number (22821750).

Almost surely, 2^645014888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645014888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730296000).

645014888 is an abundant number, since it is smaller than the sum of its proper divisors (815577112).

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

645014888 is a wasteful number, since it uses less digits than its factorization.

645014888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 44.

The square root of 645014888 is about 25397.1433039230. The cubic root of 645014888 is about 864.0189074795.

The spelling of 645014888 in words is "six hundred forty-five million, fourteen thousand, eight hundred eighty-eight".