641325645 has 24 divisors (see below), whose sum is σ = 1125030816. Its totient is φ = 337917408.

The previous prime is 641325637. The next prime is 641325647. The reversal of 641325645 is 546523146.

641325645 is a `hidden beast` number, since 6 + 4 + 1 + 3 + 2 + 5 + 645 = 666.

It is not a de Polignac number, because 641325645 - 2³ = 641325637 is a prime.

It is a super-3 number, since 3×641325645³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641325647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82119 + ... + 89588.

It is an arithmetic number, because the mean of its divisors is an integer number (46876284).

Almost surely, 2^641325645 is an apocalyptic number.

It is an amenable number.

641325645 is a deficient number, since it is larger than the sum of its proper divisors (483705171).

641325645 is a wasteful number, since it uses less digits than its factorization.

641325645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171801 (or 171798 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 641325645 is about 25324.4080878507. The cubic root of 641325645 is about 862.3684689155.

The spelling of 641325645 in words is "six hundred forty-one million, three hundred twenty-five thousand, six hundred forty-five".