81496368 has 160 divisors (see below), whose sum is σ = 252573120. Its totient is φ = 25380864.

The previous prime is 81496343. The next prime is 81496403. The reversal of 81496368 is 86369418.

81496368 is a `hidden beast` number, since 8 + 1 + 4 + 9 + 636 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 594796 + ... + 594932.

It is an arithmetic number, because the mean of its divisors is an integer number (1578582).

Almost surely, 2^81496368 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 81496368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126286560).

81496368 is an abundant number, since it is smaller than the sum of its proper divisors (171076752).

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

81496368 is a wasteful number, since it uses less digits than its factorization.

81496368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 159 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 81496368 is about 9027.5338825174. The cubic root of 81496368 is about 433.5568824197.

The spelling of 81496368 in words is "eighty-one million, four hundred ninety-six thousand, three hundred sixty-eight".