81024670848841 has 4 divisors (see below), whose sum is σ = 81026743713300. Its totient is φ = 81022597984384.

The previous prime is 81024670848791. The next prime is 81024670848881. The reversal of 81024670848841 is 14884807642018.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60594081008400 + 20430589840441 = 7784220^2 + 4520021^2 .

It is a cyclic number.

It is not a de Polignac number, because 81024670848841 - 2¹³ = 81024670840649 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 81024670848841.

It is not an unprimeable number, because it can be changed into a prime (81024670848881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036373596 + ... + 1036451773.

It is an arithmetic number, because the mean of its divisors is an integer number (20256685928325).

Almost surely, 2^{81024670848841} is an apocalyptic number.

It is an amenable number.

81024670848841 is a deficient number, since it is larger than the sum of its proper divisors (2072864459).

81024670848841 is a wasteful number, since it uses less digits than its factorization.

81024670848841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072864458.

The product of its (nonzero) digits is 22020096, while the sum is 61.

The spelling of 81024670848841 in words is "eighty-one trillion, twenty-four billion, six hundred seventy million, eight hundred forty-eight thousand, eight hundred forty-one".