6513823885 has 8 divisors (see below), whose sum is σ = 7818736536. Its totient is φ = 5209627200.

The previous prime is 6513823879. The next prime is 6513823889. The reversal of 6513823885 is 5883283156.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1375371396 + 5138452489 = 37086^2 + 71683^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6513823885 - 2⁹ = 6513823373 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 (6513823889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158766 + ... + 195535.

It is an arithmetic number, because the mean of its divisors is an integer number (977342067).

Almost surely, 2^6513823885 is an apocalyptic number.

It is an amenable number.

6513823885 is a deficient number, since it is larger than the sum of its proper divisors (1304912651).

6513823885 is a wasteful number, since it uses less digits than its factorization.

6513823885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357983.

The product of its digits is 1382400, while the sum is 49.

The square root of 6513823885 is about 80708.2640440246. The cubic root of 6513823885 is about 1867.5776622440.

The spelling of 6513823885 in words is "six billion, five hundred thirteen million, eight hundred twenty-three thousand, eight hundred eighty-five".