6494610891 has 16 divisors (see below), whose sum is σ = 8804436480. Its totient is φ = 4257311520.

The previous prime is 6494610883. The next prime is 6494610893. The reversal of 6494610891 is 1980164946.

It is not a de Polignac number, because 6494610891 - 2³ = 6494610883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6494610891.

It is not an unprimeable number, because it can be changed into a prime (6494610893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 918616 + ... + 925658.

It is an arithmetic number, because the mean of its divisors is an integer number (550277280).

Almost surely, 2^6494610891 is an apocalyptic number.

6494610891 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6494610891 is a deficient number, since it is larger than the sum of its proper divisors (2309825589).

6494610891 is a wasteful number, since it uses less digits than its factorization.

6494610891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12146.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 6494610891 is about 80589.1487174297. The cubic root of 6494610891 is about 1865.7396688938.

The spelling of 6494610891 in words is "six billion, four hundred ninety-four million, six hundred ten thousand, eight hundred ninety-one".