4076643891 has 4 divisors (see below), whose sum is σ = 5435525192. Its totient is φ = 2717762592.

The previous prime is 4076643887. The next prime is 4076643917. The reversal of 4076643891 is 1983466704.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4076643891 - 2² = 4076643887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4076643891.

It is not an unprimeable number, because it can be changed into a prime (4076243891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679440646 + ... + 679440651.

It is an arithmetic number, because the mean of its divisors is an integer number (1358881298).

Almost surely, 2^4076643891 is an apocalyptic number.

4076643891 is a deficient number, since it is larger than the sum of its proper divisors (1358881301).

4076643891 is a wasteful number, since it uses less digits than its factorization.

4076643891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358881300.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 4076643891 is about 63848.6013237565. The cubic root of 4076643891 is about 1597.4756928225.

The spelling of 4076643891 in words is "four billion, seventy-six million, six hundred forty-three thousand, eight hundred ninety-one".