81927814876 has 12 divisors (see below), whose sum is σ = 151807421808. Its totient is φ = 38554265792.

The previous prime is 81927814873. The next prime is 81927814889. The reversal of 81927814876 is 67841872918.

It is a super-2 number, since 2×81927814876² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81927814873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602410336 + ... + 602410471.

It is an arithmetic number, because the mean of its divisors is an integer number (12650618484).

Almost surely, 2^81927814876 is an apocalyptic number.

It is an amenable number.

81927814876 is a deficient number, since it is larger than the sum of its proper divisors (69879606932).

81927814876 is a wasteful number, since it uses less digits than its factorization.

81927814876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204820828 (or 1204820826 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 61.

The spelling of 81927814876 in words is "eighty-one billion, nine hundred twenty-seven million, eight hundred fourteen thousand, eight hundred seventy-six".