81568192 has 28 divisors (see below), whose sum is σ = 167087296. Its totient is φ = 39467520.

The previous prime is 81568187. The next prime is 81568199. The reversal of 81568192 is 29186518.

It is a super-2 number, since 2×81568192² = 13306739892297728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81568199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18573 + ... + 22540.

Almost surely, 2^81568192 is an apocalyptic number.

It is an amenable number.

81568192 is an abundant number, since it is smaller than the sum of its proper divisors (85519104).

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

81568192 is a wasteful number, since it uses less digits than its factorization.

81568192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41156 (or 41146 counting only the distinct ones).

The product of its digits is 34560, while the sum is 40.

The square root of 81568192 is about 9031.5110585106. The cubic root of 81568192 is about 433.6842117996.

The spelling of 81568192 in words is "eighty-one million, five hundred sixty-eight thousand, one hundred ninety-two".