81292842086401 has 16 divisors (see below), whose sum is σ = 91092617161920. Its totient is φ = 71895209100480.

The previous prime is 81292842086377. The next prime is 81292842086419. The reversal of 81292842086401 is 10468024829218.

It is a cyclic number.

It is not a de Polignac number, because 81292842086401 - 2⁷ = 81292842086273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81292842086431) 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, 10970586 + ... + 16820803.

It is an arithmetic number, because the mean of its divisors is an integer number (5693288572620).

Almost surely, 2^{81292842086401} is an apocalyptic number.

It is an amenable number.

81292842086401 is a deficient number, since it is larger than the sum of its proper divisors (9799775075519).

81292842086401 is a wasteful number, since it uses less digits than its factorization.

81292842086401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27798624.

The product of its (nonzero) digits is 3538944, while the sum is 55.

The spelling of 81292842086401 in words is "eighty-one trillion, two hundred ninety-two billion, eight hundred forty-two million, eighty-six thousand, four hundred one".