81046364 has 12 divisors (see below), whose sum is σ = 162092784. Its totient is φ = 34734144.

The previous prime is 81046363. The next prime is 81046379. The reversal of 81046364 is 46364018.

81046364 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 81046364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81046363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1447229 + ... + 1447284.

It is an arithmetic number, because the mean of its divisors is an integer number (13507732).

Almost surely, 2^81046364 is an apocalyptic number.

It is an amenable number.

81046364 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81046364 is a wasteful number, since it uses less digits than its factorization.

81046364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894524 (or 2894522 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 81046364 is about 9002.5754092926. The cubic root of 81046364 is about 432.7574089993.

It can be divided in two parts, 810 and 46364, that added together give a palindrome (47174).

The spelling of 81046364 in words is "eighty-one million, forty-six thousand, three hundred sixty-four".