81070968 has 48 divisors (see below), whose sum is σ = 222785640. Its totient is φ = 24566080.

The previous prime is 81070963. The next prime is 81071009. The reversal of 81070968 is 86907018.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81070961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11055 + ... + 16862.

Almost surely, 2^81070968 is an apocalyptic number.

81070968 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

81070968 is an abundant number, since it is smaller than the sum of its proper divisors (141714672).

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

81070968 is a wasteful number, since it uses less digits than its factorization.

81070968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27948 (or 27933 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 81070968 is about 9003.9418034548. The cubic root of 81070968 is about 432.8011966351.

The spelling of 81070968 in words is "eighty-one million, seventy thousand, nine hundred sixty-eight".