81146363 has 2 divisors, whose sum is σ = 81146364. Its totient is φ = 81146362.

The previous prime is 81146357. The next prime is 81146381. The reversal of 81146363 is 36364118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81146363 - 2⁴ = 81146347 is a prime.

It is not a weakly prime, because it can be changed into another prime (81146353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40573181 + 40573182.

It is an arithmetic number, because the mean of its divisors is an integer number (40573182).

Almost surely, 2^81146363 is an apocalyptic number.

81146363 is a deficient number, since it is larger than the sum of its proper divisors (1).

81146363 is an equidigital number, since it uses as much as digits as its factorization.

81146363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 81146363 is about 9008.1276078883. The cubic root of 81146363 is about 432.9353216565.

It can be divided in two parts, 811 and 46363, that added together give a palindrome (47174).

The spelling of 81146363 in words is "eighty-one million, one hundred forty-six thousand, three hundred sixty-three".