81346674 has 16 divisors (see below), whose sum is σ = 164922912. Its totient is φ = 26743968.

The previous prime is 81346673. The next prime is 81346693. The reversal of 81346674 is 47664318.

It is not an unprimeable number, because it can be changed into a prime (81346673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92424 + ... + 93299.

It is an arithmetic number, because the mean of its divisors is an integer number (10307682).

Almost surely, 2^81346674 is an apocalyptic number.

81346674 is an abundant number, since it is smaller than the sum of its proper divisors (83576238).

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

81346674 is a wasteful number, since it uses less digits than its factorization.

81346674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185801.

The product of its digits is 96768, while the sum is 39.

The square root of 81346674 is about 9019.2391031616. The cubic root of 81346674 is about 433.2912646866.

The spelling of 81346674 in words is "eighty-one million, three hundred forty-six thousand, six hundred seventy-four".