641326351 has 4 divisors (see below), whose sum is σ = 646222104. Its totient is φ = 636430600.

The previous prime is 641326349. The next prime is 641326363. The reversal of 641326351 is 153623146.

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 641326351 - 2¹ = 641326349 is a prime.

It is a super-2 number, since 2×641326351² = 822598976973950402, which 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 (641326331) 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 3 ways as a sum of consecutive naturals, for example, 2447680 + ... + 2447941.

It is an arithmetic number, because the mean of its divisors is an integer number (161555526).

Almost surely, 2^641326351 is an apocalyptic number.

641326351 is a deficient number, since it is larger than the sum of its proper divisors (4895753).

641326351 is a wasteful number, since it uses less digits than its factorization.

641326351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4895752.

The product of its digits is 12960, while the sum is 31.

The square root of 641326351 is about 25324.4220269684. The cubic root of 641326351 is about 862.3687853600.

Adding to 641326351 its reverse (153623146), we get a palindrome (794949497).

The spelling of 641326351 in words is "six hundred forty-one million, three hundred twenty-six thousand, three hundred fifty-one".