641121672673 has 8 divisors (see below), whose sum is σ = 684842101128. Its totient is φ = 598068731904.

The previous prime is 641121672661. The next prime is 641121672679. The reversal of 641121672673 is 376276121146.

641121672673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9529078689 + 631592593984 = 97617^2 + 794728^2 .

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 641121672673 - 2⁵ = 641121672641 is a prime.

It is a super-2 number, since 2×641121672673² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641121672679) 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, 166869936 + ... + 166873777.

It is an arithmetic number, because the mean of its divisors is an integer number (85605262641).

Almost surely, 2^641121672673 is an apocalyptic number.

It is an amenable number.

641121672673 is a deficient number, since it is larger than the sum of its proper divisors (43720428455).

641121672673 is a wasteful number, since it uses less digits than its factorization.

641121672673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333743843.

The product of its digits is 508032, while the sum is 46.

The spelling of 641121672673 in words is "six hundred forty-one billion, one hundred twenty-one million, six hundred seventy-two thousand, six hundred seventy-three".