81704701841 has 4 divisors (see below), whose sum is σ = 93376802112. Its totient is φ = 70032601572.

The previous prime is 81704701831. The next prime is 81704701847. The reversal of 81704701841 is 14810740718.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81704701841 - 2⁶ = 81704701777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81704701847) 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, 5836050125 + ... + 5836050138.

It is an arithmetic number, because the mean of its divisors is an integer number (23344200528).

Almost surely, 2^81704701841 is an apocalyptic number.

It is an amenable number.

81704701841 is a deficient number, since it is larger than the sum of its proper divisors (11672100271).

81704701841 is a wasteful number, since it uses less digits than its factorization.

81704701841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11672100270.

The product of its (nonzero) digits is 50176, while the sum is 41.

The spelling of 81704701841 in words is "eighty-one billion, seven hundred four million, seven hundred one thousand, eight hundred forty-one".