81158983355 has 8 divisors (see below), whose sum is σ = 97413889200. Its totient is φ = 64911780576.

The previous prime is 81158983349. The next prime is 81158983393. The reversal of 81158983355 is 55338985118.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81158983355 - 2¹⁸ = 81158721211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81158983355.

It is an unprimeable number.

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, 1902560 + ... + 1944749.

It is an arithmetic number, because the mean of its divisors is an integer number (12176736150).

Almost surely, 2^81158983355 is an apocalyptic number.

81158983355 is a deficient number, since it is larger than the sum of its proper divisors (16254905845).

81158983355 is a wasteful number, since it uses less digits than its factorization.

81158983355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3851533.

The product of its digits is 5184000, while the sum is 56.

The spelling of 81158983355 in words is "eighty-one billion, one hundred fifty-eight million, nine hundred eighty-three thousand, three hundred fifty-five".