641040423 has 8 divisors (see below), whose sum is σ = 856145136. Its totient is φ = 426648000.

The previous prime is 641040419. The next prime is 641040481. The reversal of 641040423 is 324040146.

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

It is not a de Polignac number, because 641040423 - 2² = 641040419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 641040393 and 641040402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641040493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175968 + ... + 179573.

It is an arithmetic number, because the mean of its divisors is an integer number (107018142).

Almost surely, 2^641040423 is an apocalyptic number.

641040423 is a deficient number, since it is larger than the sum of its proper divisors (215104713).

641040423 is a wasteful number, since it uses less digits than its factorization.

641040423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356145.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 641040423 is about 25318.7760960122. The cubic root of 641040423 is about 862.2406072309.

Adding to 641040423 its reverse (324040146), we get a palindrome (965080569).

The spelling of 641040423 in words is "six hundred forty-one million, forty thousand, four hundred twenty-three".