6475880891 has 4 divisors (see below), whose sum is σ = 6509434872. Its totient is φ = 6442326912.

The previous prime is 6475880861. The next prime is 6475880909. The reversal of 6475880891 is 1980885746.

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

It is a cyclic number.

It is not a de Polignac number, because 6475880891 - 2²² = 6471686587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6475880861) 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, 16776701 + ... + 16777086.

It is an arithmetic number, because the mean of its divisors is an integer number (1627358718).

Almost surely, 2^6475880891 is an apocalyptic number.

6475880891 is a deficient number, since it is larger than the sum of its proper divisors (33553981).

6475880891 is a wasteful number, since it uses less digits than its factorization.

6475880891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33553980.

The product of its (nonzero) digits is 3870720, while the sum is 56.

The square root of 6475880891 is about 80472.8581013499. The cubic root of 6475880891 is about 1863.9443880691.

The spelling of 6475880891 in words is "six billion, four hundred seventy-five million, eight hundred eighty thousand, eight hundred ninety-one".