641713788541 has 4 divisors (see below), whose sum is σ = 733387186912. Its totient is φ = 550040390172.

The previous prime is 641713788439. The next prime is 641713788581. The reversal of 641713788541 is 145887317146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 641713788541 - 2¹³ = 641713780349 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 (641713788581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45836699175 + ... + 45836699188.

It is an arithmetic number, because the mean of its divisors is an integer number (183346796728).

Almost surely, 2^641713788541 is an apocalyptic number.

It is an amenable number.

641713788541 is a deficient number, since it is larger than the sum of its proper divisors (91673398371).

641713788541 is an equidigital number, since it uses as much as digits as its factorization.

641713788541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91673398370.

The product of its digits is 4515840, while the sum is 55.

The spelling of 641713788541 in words is "six hundred forty-one billion, seven hundred thirteen million, seven hundred eighty-eight thousand, five hundred forty-one".