81170496 has 168 divisors, whose sum is σ = 265322304. Its totient is φ = 23485440.

The previous prime is 81170477. The next prime is 81170497. The reversal of 81170496 is 69407118.

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

It is a self number, because there is not a number n which added to its sum of digits gives 81170496.

It is not an unprimeable number, because it can be changed into a prime (81170497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145450 + ... + 146006.

Almost surely, 2^81170496 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 81170496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132661152).

81170496 is an abundant number, since it is smaller than the sum of its proper divisors (184151808).

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

81170496 is a wasteful number, since it uses less digits than its factorization.

81170496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 81170496 is about 9009.4670208620. The cubic root of 81170496 is about 432.9782358515.

The spelling of 81170496 in words is "eighty-one million, one hundred seventy thousand, four hundred ninety-six".