641335045 has 8 divisors (see below), whose sum is σ = 828802296. Its totient is φ = 473601216.

The previous prime is 641335043. The next prime is 641335049. The reversal of 641335045 is 540533146.

It can be written as a sum of positive squares in 4 ways, for example, as 6395841 + 634939204 = 2529^2 + 25198^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641335045 - 2¹ = 641335043 is a prime.

It is a super-3 number, since 3×641335045³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641334998 and 641335016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641335043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4933282 + ... + 4933411.

It is an arithmetic number, because the mean of its divisors is an integer number (103600287).

Almost surely, 2^641335045 is an apocalyptic number.

641335045 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

641335045 is a deficient number, since it is larger than the sum of its proper divisors (187467251).

641335045 is a wasteful number, since it uses less digits than its factorization.

641335045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9866711.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 641335045 is about 25324.5936788727. The cubic root of 641335045 is about 862.3726821801.

The spelling of 641335045 in words is "six hundred forty-one million, three hundred thirty-five thousand, forty-five".