81746612 has 12 divisors (see below), whose sum is σ = 146383776. Its totient is φ = 39922680.

The previous prime is 81746551. The next prime is 81746647. The reversal of 81746612 is 21664718.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237464 + ... + 237807.

It is an arithmetic number, because the mean of its divisors is an integer number (12198648).

Almost surely, 2^81746612 is an apocalyptic number.

It is an amenable number.

81746612 is a deficient number, since it is larger than the sum of its proper divisors (64637164).

81746612 is a wasteful number, since it uses less digits than its factorization.

81746612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475318 (or 475316 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 81746612 is about 9041.3833012432. The cubic root of 81746612 is about 434.0001911274. Note that the first 3 decimals are identical.

The spelling of 81746612 in words is "eighty-one million, seven hundred forty-six thousand, six hundred twelve".