81453396 has 48 divisors (see below), whose sum is σ = 199075968. Its totient is φ = 25872000.

The previous prime is 81453389. The next prime is 81453433. The reversal of 81453396 is 69335418.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 115846 + ... + 116546.

It is an arithmetic number, because the mean of its divisors is an integer number (4147416).

Almost surely, 2^81453396 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 81453396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99537984).

81453396 is an abundant number, since it is smaller than the sum of its proper divisors (117622572).

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

81453396 is a wasteful number, since it uses less digits than its factorization.

81453396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1150 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 81453396 is about 9025.1535166999. The cubic root of 81453396 is about 433.4806660093.

The spelling of 81453396 in words is "eighty-one million, four hundred fifty-three thousand, three hundred ninety-six".