641676331 has 4 divisors (see below), whose sum is σ = 648029664. Its totient is φ = 635323000.

The previous prime is 641676319. The next prime is 641676367. The reversal of 641676331 is 133676146.

It is a happy number.

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 641676331 - 2²¹ = 639579179 is a prime.

It is a super-2 number, since 2×641676331² = 823497027531243122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641676131) 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, 3176515 + ... + 3176716.

It is an arithmetic number, because the mean of its divisors is an integer number (162007416).

Almost surely, 2^641676331 is an apocalyptic number.

641676331 is a deficient number, since it is larger than the sum of its proper divisors (6353333).

641676331 is a wasteful number, since it uses less digits than its factorization.

641676331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6353332.

The product of its digits is 54432, while the sum is 37.

The square root of 641676331 is about 25331.3310151678. The cubic root of 641676331 is about 862.5256253956.

The spelling of 641676331 in words is "six hundred forty-one million, six hundred seventy-six thousand, three hundred thirty-one".