81743464 has 16 divisors (see below), whose sum is σ = 167202720. Its totient is φ = 37156080.

The previous prime is 81743461. The next prime is 81743479. The reversal of 81743464 is 46434718.

It is not an unprimeable number, because it can be changed into a prime (81743461) 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, 464364 + ... + 464539.

It is an arithmetic number, because the mean of its divisors is an integer number (10450170).

Almost surely, 2^81743464 is an apocalyptic number.

It is an amenable number.

81743464 is an abundant number, since it is smaller than the sum of its proper divisors (85459256).

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

81743464 is a wasteful number, since it uses less digits than its factorization.

81743464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928920 (or 928916 counting only the distinct ones).

The product of its digits is 64512, while the sum is 37.

The square root of 81743464 is about 9041.2092111620. The cubic root of 81743464 is about 433.9946200498.

The spelling of 81743464 in words is "eighty-one million, seven hundred forty-three thousand, four hundred sixty-four".