641676901 has 8 divisors (see below), whose sum is σ = 654159744. Its totient is φ = 629307360.

The previous prime is 641676863. The next prime is 641676923. The reversal of 641676901 is 109676146.

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 641676901 - 2¹⁷ = 641545829 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 (641676961) 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 7 ways as a sum of consecutive naturals, for example, 16845 + ... + 39586.

It is an arithmetic number, because the mean of its divisors is an integer number (81769968).

Almost surely, 2^641676901 is an apocalyptic number.

It is an amenable number.

641676901 is a deficient number, since it is larger than the sum of its proper divisors (12482843).

641676901 is a wasteful number, since it uses less digits than its factorization.

641676901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56651.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 641676901 is about 25331.3422660545. The cubic root of 641676901 is about 862.5258807889.

The spelling of 641676901 in words is "six hundred forty-one million, six hundred seventy-six thousand, nine hundred one".