6491896823 has 6 divisors (see below), whose sum is σ = 6502785264. Its totient is φ = 6481026564.

The previous prime is 6491896799. The next prime is 6491896841. The reversal of 6491896823 is 3286981946.

It is a happy number.

It is not a de Polignac number, because 6491896823 - 2⁶ = 6491896759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6491896423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374690 + ... + 391632.

It is an arithmetic number, because the mean of its divisors is an integer number (1083797544).

Almost surely, 2^6491896823 is an apocalyptic number.

6491896823 is a deficient number, since it is larger than the sum of its proper divisors (10888441).

6491896823 is an frugal number, since it uses more digits than its factorization.

6491896823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18181 (or 17562 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 56.

The square root of 6491896823 is about 80572.3080406662. The cubic root of 6491896823 is about 1865.4797380089.

The spelling of 6491896823 in words is "six billion, four hundred ninety-one million, eight hundred ninety-six thousand, eight hundred twenty-three".