645602112 has 42 divisors (see below), whose sum is σ = 1850503538. Its totient is φ = 215200512.

The previous prime is 645602093. The next prime is 645602117. The reversal of 645602112 is 211206546.

645602112 is a `hidden beast` number, since 6 + 45 + 602 + 1 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 431974656 + 213627456 = 20784^2 + 14616^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645602117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 559843 + ... + 560994.

Almost surely, 2^645602112 is an apocalyptic number.

It is an amenable number.

645602112 is an abundant number, since it is smaller than the sum of its proper divisors (1204901426).

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

645602112 is a wasteful number, since it uses less digits than its factorization.

645602112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120855 (or 1120842 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 645602112 is about 25408.7015016510. The cubic root of 645602112 is about 864.2810299797.

Adding to 645602112 its reverse (211206546), we get a palindrome (856808658).

The spelling of 645602112 in words is "six hundred forty-five million, six hundred two thousand, one hundred twelve".