645354582 has 16 divisors (see below), whose sum is σ = 1291377600. Its totient is φ = 215006792.

The previous prime is 645354581. The next prime is 645354599. The reversal of 645354582 is 285453546.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645354581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14832 + ... + 38867.

It is an arithmetic number, because the mean of its divisors is an integer number (80711100).

Almost surely, 2^645354582 is an apocalyptic number.

645354582 is an abundant number, since it is smaller than the sum of its proper divisors (646023018).

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

645354582 is a wasteful number, since it uses less digits than its factorization.

645354582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55707.

The product of its digits is 576000, while the sum is 42.

The square root of 645354582 is about 25403.8300655629. The cubic root of 645354582 is about 864.1705579997.

The spelling of 645354582 in words is "six hundred forty-five million, three hundred fifty-four thousand, five hundred eighty-two".