81425676 has 24 divisors (see below), whose sum is σ = 191383920. Its totient is φ = 26943232.

The previous prime is 81425657. The next prime is 81425677. The reversal of 81425676 is 67652418.

It is not an unprimeable number, because it can be changed into a prime (81425677) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23121 + ... + 26408.

It is an arithmetic number, because the mean of its divisors is an integer number (7974330).

Almost surely, 2^81425676 is an apocalyptic number.

It is an amenable number.

81425676 is an abundant number, since it is smaller than the sum of its proper divisors (109958244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81425676 is a wasteful number, since it uses less digits than its factorization.

81425676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49673 (or 49671 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 81425676 is about 9023.6176780713. The cubic root of 81425676 is about 433.4314867730.

The spelling of 81425676 in words is "eighty-one million, four hundred twenty-five thousand, six hundred seventy-six".