641210334431 has 4 divisors (see below), whose sum is σ = 654853107552. Its totient is φ = 627567561312.

The previous prime is 641210334419. The next prime is 641210334467. The reversal of 641210334431 is 134433012146.

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 641210334431 - 2⁶ = 641210334367 is a prime.

It is a super-2 number, since 2×641210334431² (a number of 24 digits) contains 22 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 (641210331431) 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, 6821386490 + ... + 6821386583.

It is an arithmetic number, because the mean of its divisors is an integer number (163713276888).

Almost surely, 2^641210334431 is an apocalyptic number.

641210334431 is a deficient number, since it is larger than the sum of its proper divisors (13642773121).

641210334431 is a wasteful number, since it uses less digits than its factorization.

641210334431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13642773120.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 641210334431 its reverse (134433012146), we get a palindrome (775643346577).

The spelling of 641210334431 in words is "six hundred forty-one billion, two hundred ten million, three hundred thirty-four thousand, four hundred thirty-one".