641876407 has 8 divisors (see below), whose sum is σ = 660267936. Its totient is φ = 623539872.

The previous prime is 641876393. The next prime is 641876419. The reversal of 641876407 is 704678146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641876407 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 (641876447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10533 + ... + 37345.

It is an arithmetic number, because the mean of its divisors is an integer number (82533492).

Almost surely, 2^641876407 is an apocalyptic number.

641876407 is a deficient number, since it is larger than the sum of its proper divisors (18391529).

641876407 is a wasteful number, since it uses less digits than its factorization.

641876407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27497.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 641876407 is about 25335.2798879349. The cubic root of 641876407 is about 862.6152618348.

The spelling of 641876407 in words is "six hundred forty-one million, eight hundred seventy-six thousand, four hundred seven".