81546192 has 240 divisors, whose sum is σ = 288870400. Its totient is φ = 21337344.

The previous prime is 81546181. The next prime is 81546193. The reversal of 81546192 is 29164518.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81546193) 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 47 ways as a sum of consecutive naturals, for example, 642033 + ... + 642159.

Almost surely, 2^81546192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81546192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144435200).

81546192 is an abundant number, since it is smaller than the sum of its proper divisors (207324208).

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

81546192 is a wasteful number, since it uses less digits than its factorization.

81546192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 152 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 81546192 is about 9030.2930185017. The cubic root of 81546192 is about 433.6452182069.

The spelling of 81546192 in words is "eighty-one million, five hundred forty-six thousand, one hundred ninety-two".