641680277 has 8 divisors (see below), whose sum is σ = 734026176. Its totient is φ = 549503712.

The previous prime is 641680229. The next prime is 641680279. The reversal of 641680277 is 772086146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641680277 - 2⁸ = 641680021 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 (641680279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34103 + ... + 49460.

It is an arithmetic number, because the mean of its divisors is an integer number (91753272).

Almost surely, 2^641680277 is an apocalyptic number.

It is an amenable number.

641680277 is a deficient number, since it is larger than the sum of its proper divisors (92345899).

641680277 is a wasteful number, since it uses less digits than its factorization.

641680277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84667.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 641680277 is about 25331.4089027831. The cubic root of 641680277 is about 862.5273934309.

The spelling of 641680277 in words is "six hundred forty-one million, six hundred eighty thousand, two hundred seventy-seven".