81734576 has 40 divisors (see below), whose sum is σ = 197439744. Its totient is φ = 31844160.

The previous prime is 81734567. The next prime is 81734579. The reversal of 81734576 is 67543718.

It is not an unprimeable number, because it can be changed into a prime (81734579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31940 + ... + 34403.

Almost surely, 2^81734576 is an apocalyptic number.

It is an amenable number.

81734576 is an abundant number, since it is smaller than the sum of its proper divisors (115705168).

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

81734576 is a wasteful number, since it uses less digits than its factorization.

81734576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66369 (or 66363 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 81734576 is about 9040.7176706277. The cubic root of 81734576 is about 433.9788900093.

The spelling of 81734576 in words is "eighty-one million, seven hundred thirty-four thousand, five hundred seventy-six".