641306045 has 8 divisors (see below), whose sum is σ = 814836024. Its totient is φ = 482865664.

The previous prime is 641306041. The next prime is 641306047. The reversal of 641306045 is 540603146.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 80658361 + 560647684 = 8981^2 + 23678^2 .

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 641306045 - 2² = 641306041 is a prime.

It is a super-2 number, since 2×641306045² = 822546886707084050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641305999 and 641306017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641306041) 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, 3772304 + ... + 3772473.

It is an arithmetic number, because the mean of its divisors is an integer number (101854503).

Almost surely, 2^641306045 is an apocalyptic number.

It is an amenable number.

641306045 is a deficient number, since it is larger than the sum of its proper divisors (173529979).

641306045 is a wasteful number, since it uses less digits than its factorization.

641306045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7544799.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 641306045 is about 25324.0211064515. The cubic root of 641306045 is about 862.3596836780.

The spelling of 641306045 in words is "six hundred forty-one million, three hundred six thousand, forty-five".