81546363 has 12 divisors (see below), whose sum is σ = 120295968. Its totient is φ = 53207280.

The previous prime is 81546349. The next prime is 81546401. The reversal of 81546363 is 36364518.

81546363 is a `hidden beast` number, since 8 + 15 + 4 + 636 + 3 = 666.

It is not a de Polignac number, because 81546363 - 2⁸ = 81546107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81546313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95968 + ... + 96813.

It is an arithmetic number, because the mean of its divisors is an integer number (10024664).

Almost surely, 2^81546363 is an apocalyptic number.

81546363 is a deficient number, since it is larger than the sum of its proper divisors (38749605).

81546363 is a wasteful number, since it uses less digits than its factorization.

81546363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192834 (or 192831 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 81546363 is about 9030.3024866280. The cubic root of 81546363 is about 433.6455213205.

The spelling of 81546363 in words is "eighty-one million, five hundred forty-six thousand, three hundred sixty-three".