81076752961 has 8 divisors (see below), whose sum is σ = 81340058624. Its totient is φ = 80813678400.

The previous prime is 81076752947. The next prime is 81076752973. The reversal of 81076752961 is 16925767018.

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 81076752961 - 2⁷ = 81076752833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81076752899 and 81076752908.

It is not an unprimeable number, because it can be changed into a prime (81076752061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659401 + ... + 772633.

It is an arithmetic number, because the mean of its divisors is an integer number (10167507328).

Almost surely, 2^81076752961 is an apocalyptic number.

It is an amenable number.

81076752961 is a deficient number, since it is larger than the sum of its proper divisors (263305663).

81076752961 is a wasteful number, since it uses less digits than its factorization.

81076752961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115551.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 81076752961 in words is "eighty-one billion, seventy-six million, seven hundred fifty-two thousand, nine hundred sixty-one".