6479895821 has 8 divisors (see below), whose sum is σ = 7516127040. Its totient is φ = 5471297568.

The previous prime is 6479895769. The next prime is 6479895841. The reversal of 6479895821 is 1285989746.

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

It is a cyclic number.

It is not a de Polignac number, because 6479895821 - 2¹⁴ = 6479879437 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 (6479895841) 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, 6907736 + ... + 6908673.

It is an arithmetic number, because the mean of its divisors is an integer number (939515880).

Almost surely, 2^6479895821 is an apocalyptic number.

It is an amenable number.

6479895821 is a deficient number, since it is larger than the sum of its proper divisors (1036231219).

6479895821 is a wasteful number, since it uses less digits than its factorization.

6479895821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13816483.

The product of its digits is 8709120, while the sum is 59.

The square root of 6479895821 is about 80497.8001003754. The cubic root of 6479895821 is about 1864.3295125195.

The spelling of 6479895821 in words is "six billion, four hundred seventy-nine million, eight hundred ninety-five thousand, eight hundred twenty-one".