81016223087 has 8 divisors (see below), whose sum is σ = 83327700816. Its totient is φ = 78711158592.

The previous prime is 81016223051. The next prime is 81016223089. The reversal of 81016223087 is 78032261018.

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 81016223087 - 2¹⁸ = 81015960943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81016223087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81016223089) 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, 1577678 + ... + 1628219.

It is an arithmetic number, because the mean of its divisors is an integer number (10415962602).

Almost surely, 2^81016223087 is an apocalyptic number.

81016223087 is a deficient number, since it is larger than the sum of its proper divisors (2311477729).

81016223087 is a wasteful number, since it uses less digits than its factorization.

81016223087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206617.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 81016223087 in words is "eighty-one billion, sixteen million, two hundred twenty-three thousand, eighty-seven".