641535623 has 8 divisors (see below), whose sum is σ = 651144096. Its totient is φ = 631943200.

The previous prime is 641535617. The next prime is 641535649. The reversal of 641535623 is 326535146.

641535623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 641535623 - 2¹⁰ = 641534599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641535673) 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, 94193 + ... + 100773.

It is an arithmetic number, because the mean of its divisors is an integer number (81393012).

Almost surely, 2^641535623 is an apocalyptic number.

641535623 is a deficient number, since it is larger than the sum of its proper divisors (9608473).

641535623 is a wasteful number, since it uses less digits than its factorization.

641535623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8025.

The product of its digits is 64800, while the sum is 35.

The square root of 641535623 is about 25328.5535117977. The cubic root of 641535623 is about 862.4625753698.

The spelling of 641535623 in words is "six hundred forty-one million, five hundred thirty-five thousand, six hundred twenty-three".