6815121464 has 16 divisors (see below), whose sum is σ = 13123714200. Its totient is φ = 3315464352.

The previous prime is 6815121433. The next prime is 6815121473. The reversal of 6815121464 is 4641215186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11511734 + ... + 11512325.

Almost surely, 2^6815121464 is an apocalyptic number.

It is an amenable number.

6815121464 is a deficient number, since it is larger than the sum of its proper divisors (6308592736).

6815121464 is a wasteful number, since it uses less digits than its factorization.

6815121464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23024102 (or 23024098 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 6815121464 is about 82553.7489397059. The cubic root of 6815121464 is about 1895.9397565232.

The spelling of 6815121464 in words is "six billion, eight hundred fifteen million, one hundred twenty-one thousand, four hundred sixty-four".