81168850 has 48 divisors (see below), whose sum is σ = 178131456. Its totient is φ = 26928000.

The previous prime is 81168839. The next prime is 81168853. The reversal of 81168850 is 5886118.

It is not an unprimeable number, because it can be changed into a prime (81168853) 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 23 ways as a sum of consecutive naturals, for example, 7110 + ... + 14590.

It is an arithmetic number, because the mean of its divisors is an integer number (3711072).

Almost surely, 2^81168850 is an apocalyptic number.

81168850 is an abundant number, since it is smaller than the sum of its proper divisors (96962606).

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

81168850 is a wasteful number, since it uses less digits than its factorization.

81168850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7531 (or 7526 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 81168850 is about 9009.3756720430. The cubic root of 81168850 is about 432.9753091436.

The spelling of 81168850 in words is "eighty-one million, one hundred sixty-eight thousand, eight hundred fifty".