641385545 has 8 divisors (see below), whose sum is σ = 770250624. Its totient is φ = 512716464.

The previous prime is 641385541. The next prime is 641385551. The reversal of 641385545 is 545583146.

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 641385545 - 2² = 641385541 is a prime.

It is a super-2 number, since 2×641385545² = 822750834669894050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641385541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41699 + ... + 54968.

It is an arithmetic number, because the mean of its divisors is an integer number (96281328).

Almost surely, 2^641385545 is an apocalyptic number.

It is an amenable number.

641385545 is a deficient number, since it is larger than the sum of its proper divisors (128865079).

641385545 is a wasteful number, since it uses less digits than its factorization.

641385545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97999.

The product of its digits is 288000, while the sum is 41.

The square root of 641385545 is about 25325.5907137425. The cubic root of 641385545 is about 862.3953165674.

The spelling of 641385545 in words is "six hundred forty-one million, three hundred eighty-five thousand, five hundred forty-five".