81176612051 has 8 divisors (see below), whose sum is σ = 84045763200. Its totient is φ = 78312124800.

The previous prime is 81176612021. The next prime is 81176612063. The reversal of 81176612051 is 15021667118.

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 81176612051 - 2¹⁰ = 81176611027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81176611996 and 81176612014.

It is not an unprimeable number, because it can be changed into a prime (81176612021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130531 + ... + 1200188.

It is an arithmetic number, because the mean of its divisors is an integer number (10505720400).

Almost surely, 2^81176612051 is an apocalyptic number.

81176612051 is a deficient number, since it is larger than the sum of its proper divisors (2869151149).

81176612051 is a wasteful number, since it uses less digits than its factorization.

81176612051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331949.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 81176612051 in words is "eighty-one billion, one hundred seventy-six million, six hundred twelve thousand, fifty-one".