81360451163 has 8 divisors (see below), whose sum is σ = 83214292032. Its totient is φ = 79511725696.

The previous prime is 81360451141. The next prime is 81360451169. The reversal of 81360451163 is 36115406318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81360451163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81360451169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1246670 + ... + 1310307.

It is an arithmetic number, because the mean of its divisors is an integer number (10401786504).

Almost surely, 2^81360451163 is an apocalyptic number.

81360451163 is a deficient number, since it is larger than the sum of its proper divisors (1853840869).

81360451163 is a wasteful number, since it uses less digits than its factorization.

81360451163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557701.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 81360451163 in words is "eighty-one billion, three hundred sixty million, four hundred fifty-one thousand, one hundred sixty-three".