81349676 has 6 divisors (see below), whose sum is σ = 142361940. Its totient is φ = 40674836.

The previous prime is 81349663. The next prime is 81349703. The reversal of 81349676 is 67694318.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10168706 + ... + 10168713.

It is an arithmetic number, because the mean of its divisors is an integer number (23726990).

Almost surely, 2^81349676 is an apocalyptic number.

It is an amenable number.

81349676 is a deficient number, since it is larger than the sum of its proper divisors (61012264).

81349676 is a wasteful number, since it uses less digits than its factorization.

81349676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20337423 (or 20337421 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 81349676 is about 9019.4055236473. The cubic root of 81349676 is about 433.2965946500.

The spelling of 81349676 in words is "eighty-one million, three hundred forty-nine thousand, six hundred seventy-six".