6881434491 has 4 divisors (see below), whose sum is σ = 9175245992. Its totient is φ = 4587622992.

The previous prime is 6881434487. The next prime is 6881434517. The reversal of 6881434491 is 1944341886.

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

It is not a de Polignac number, because 6881434491 - 2² = 6881434487 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 6881434491.

It is not an unprimeable number, because it can be changed into a prime (6881434451) 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, 1146905746 + ... + 1146905751.

It is an arithmetic number, because the mean of its divisors is an integer number (2293811498).

Almost surely, 2^6881434491 is an apocalyptic number.

6881434491 is a deficient number, since it is larger than the sum of its proper divisors (2293811501).

6881434491 is a wasteful number, since it uses less digits than its factorization.

6881434491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293811500.

The product of its digits is 663552, while the sum is 48.

The square root of 6881434491 is about 82954.4121249738. The cubic root of 6881434491 is about 1902.0692590666.

The spelling of 6881434491 in words is "six billion, eight hundred eighty-one million, four hundred thirty-four thousand, four hundred ninety-one".