641654533 has 8 divisors (see below), whose sum is σ = 693907200. Its totient is φ = 589815408.

The previous prime is 641654467. The next prime is 641654537. The reversal of 641654533 is 335456146.

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

It is not a de Polignac number, because 641654533 - 2²¹ = 639557381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641654492 and 641654501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641654537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100153 + ... + 106366.

It is an arithmetic number, because the mean of its divisors is an integer number (86738400).

Almost surely, 2^641654533 is an apocalyptic number.

It is an amenable number.

641654533 is a deficient number, since it is larger than the sum of its proper divisors (52252667).

641654533 is a wasteful number, since it uses less digits than its factorization.

641654533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206771.

The product of its digits is 129600, while the sum is 37.

The square root of 641654533 is about 25330.9007538224. The cubic root of 641654533 is about 862.5158585056.

The spelling of 641654533 in words is "six hundred forty-one million, six hundred fifty-four thousand, five hundred thirty-three".