645084530 has 16 divisors (see below), whose sum is σ = 1164222720. Its totient is φ = 257351472.

The previous prime is 645084511. The next prime is 645084553. The reversal of 645084530 is 35480546.

It is a super-2 number, since 2×645084530² = 832268101690641800, which contains 22 as substring.

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, 81314 + ... + 88893.

It is an arithmetic number, because the mean of its divisors is an integer number (72763920).

Almost surely, 2^645084530 is an apocalyptic number.

645084530 is a deficient number, since it is larger than the sum of its proper divisors (519138190).

645084530 is a wasteful number, since it uses less digits than its factorization.

645084530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170593.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 645084530 is about 25398.5143266294. The cubic root of 645084530 is about 864.0500022859.

The spelling of 645084530 in words is "six hundred forty-five million, eighty-four thousand, five hundred thirty".