645902182 has 16 divisors (see below), whose sum is σ = 1038208752. Its totient is φ = 300290560.

The previous prime is 645902141. The next prime is 645902251. The reversal of 645902182 is 281209546.

It is a super-2 number, since 2×645902182² = 834379257424722248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111619 + ... + 117262.

It is an arithmetic number, because the mean of its divisors is an integer number (64888047).

Almost surely, 2^645902182 is an apocalyptic number.

645902182 is a deficient number, since it is larger than the sum of its proper divisors (392306570).

645902182 is a wasteful number, since it uses less digits than its factorization.

645902182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228983.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 645902182 is about 25414.6056825598. The cubic root of 645902182 is about 864.4149125646.

The spelling of 645902182 in words is "six hundred forty-five million, nine hundred two thousand, one hundred eighty-two".