6815196981 has 32 divisors (see below), whose sum is σ = 10494529920. Its totient is φ = 4367354112.

The previous prime is 6815196943. The next prime is 6815196991. The reversal of 6815196981 is 1896915186.

6815196981 is a `hidden beast` number, since 68 + 1 + 519 + 69 + 8 + 1 = 666.

It is not a de Polignac number, because 6815196981 - 2⁶ = 6815196917 is a prime.

It is a super-2 number, since 2×6815196981² = 92893819779663028722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6815196911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41821 + ... + 124013.

It is an arithmetic number, because the mean of its divisors is an integer number (327954060).

Almost surely, 2^6815196981 is an apocalyptic number.

It is an amenable number.

6815196981 is a deficient number, since it is larger than the sum of its proper divisors (3679332939).

6815196981 is a wasteful number, since it uses less digits than its factorization.

6815196981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82322 (or 82316 counting only the distinct ones).

The product of its digits is 933120, while the sum is 54.

The square root of 6815196981 is about 82554.2063192421. The cubic root of 6815196981 is about 1895.9467593406.

The spelling of 6815196981 in words is "six billion, eight hundred fifteen million, one hundred ninety-six thousand, nine hundred eighty-one".