81113762 has 8 divisors (see below), whose sum is σ = 121709100. Its totient is φ = 40544064.

The previous prime is 81113761. The next prime is 81113771. The reversal of 81113762 is 26731118.

It can be written as a sum of positive squares in 2 ways, for example, as 71385601 + 9728161 = 8449^2 + 3119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (81113761) 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 3 ways as a sum of consecutive naturals, for example, 7814 + ... + 14942.

Almost surely, 2^81113762 is an apocalyptic number.

81113762 is a deficient number, since it is larger than the sum of its proper divisors (40595338).

81113762 is a wasteful number, since it uses less digits than its factorization.

81113762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12820.

The product of its digits is 2016, while the sum is 29.

The square root of 81113762 is about 9006.3178935678. The cubic root of 81113762 is about 432.8773358374.

The spelling of 81113762 in words is "eighty-one million, one hundred thirteen thousand, seven hundred sixty-two".