645806882 has 8 divisors (see below), whose sum is σ = 1107097536. Its totient is φ = 276774372.

The previous prime is 645806881. The next prime is 645806921. The reversal of 645806882 is 288608546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×645806882³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (645806881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23064518 + ... + 23064545.

It is an arithmetic number, because the mean of its divisors is an integer number (138387192).

Almost surely, 2^645806882 is an apocalyptic number.

645806882 is a deficient number, since it is larger than the sum of its proper divisors (461290654).

645806882 is a wasteful number, since it uses less digits than its factorization.

645806882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46129072.

The product of its (nonzero) digits is 737280, while the sum is 47.

The square root of 645806882 is about 25412.7307072656. The cubic root of 645806882 is about 864.3723969457.

The spelling of 645806882 in words is "six hundred forty-five million, eight hundred six thousand, eight hundred eighty-two".