641041402 has 8 divisors (see below), whose sum is σ = 961715412. Its totient is φ = 320469600.

The previous prime is 641041369. The next prime is 641041439. The reversal of 641041402 is 204140146.

It can be written as a sum of positive squares in 2 ways, for example, as 640039401 + 1002001 = 25299^2 + 1001^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7249 + ... + 36532.

Almost surely, 2^641041402 is an apocalyptic number.

641041402 is a deficient number, since it is larger than the sum of its proper divisors (320674010).

641041402 is a wasteful number, since it uses less digits than its factorization.

641041402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51104.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 641041402 is about 25318.7954294828. The cubic root of 641041402 is about 862.2410461700.

Adding to 641041402 its reverse (204140146), we get a palindrome (845181548).

The spelling of 641041402 in words is "six hundred forty-one million, forty-one thousand, four hundred two".