641496403 has 8 divisors (see below), whose sum is σ = 657248768. Its totient is φ = 625782024.

The previous prime is 641496397. The next prime is 641496407. The reversal of 641496403 is 304694146.

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 641496403 - 2⁵ = 641496371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641496407) 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, 26326 + ... + 44452.

It is an arithmetic number, because the mean of its divisors is an integer number (82156096).

Almost surely, 2^641496403 is an apocalyptic number.

641496403 is a deficient number, since it is larger than the sum of its proper divisors (15752365).

641496403 is a wasteful number, since it uses less digits than its factorization.

641496403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18993.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 641496403 is about 25327.7792749384. The cubic root of 641496403 is about 862.4449995874. Note that the first 3 decimals are identical.

The spelling of 641496403 in words is "six hundred forty-one million, four hundred ninety-six thousand, four hundred three".