641597026943 has 4 divisors (see below), whose sum is σ = 651173102040. Its totient is φ = 632020951848.

The previous prime is 641597026859. The next prime is 641597026949. The reversal of 641597026943 is 349620795146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641597026943 - 2¹⁰ = 641597025919 is a prime.

It is a super-3 number, since 3×641597026943³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641597026949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4788037448 + ... + 4788037581.

It is an arithmetic number, because the mean of its divisors is an integer number (162793275510).

Almost surely, 2^641597026943 is an apocalyptic number.

641597026943 is a deficient number, since it is larger than the sum of its proper divisors (9576075097).

641597026943 is an equidigital number, since it uses as much as digits as its factorization.

641597026943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9576075096.

The product of its (nonzero) digits is 9797760, while the sum is 56.

The spelling of 641597026943 in words is "six hundred forty-one billion, five hundred ninety-seven million, twenty-six thousand, nine hundred forty-three".