81067274563 has 16 divisors (see below), whose sum is σ = 93232189440. Its totient is φ = 69802718400.

The previous prime is 81067274551. The next prime is 81067274573. The reversal of 81067274563 is 36547276018.

It is a cyclic number.

It is not a de Polignac number, because 81067274563 - 2⁹ = 81067274051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81067274543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2513058 + ... + 2545111.

It is an arithmetic number, because the mean of its divisors is an integer number (5827011840).

Almost surely, 2^81067274563 is an apocalyptic number.

81067274563 is a deficient number, since it is larger than the sum of its proper divisors (12164914877).

81067274563 is a wasteful number, since it uses less digits than its factorization.

81067274563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5058258.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 81067274563 in words is "eighty-one billion, sixty-seven million, two hundred seventy-four thousand, five hundred sixty-three".