81040588110242 has 8 divisors (see below), whose sum is σ = 121587604729500. Its totient is φ = 40511386533744.

The previous prime is 81040588110241. The next prime is 81040588110253. The reversal of 81040588110242 is 24201188504018.

It can be written as a sum of positive squares in 2 ways, for example, as 76844526742201 + 4196061368041 = 8766101^2 + 2048429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 81040588110193 and 81040588110202.

It is not an unprimeable number, because it can be changed into a prime (81040588110241) 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, 4453749317 + ... + 4453767512.

Almost surely, 2^{81040588110242} is an apocalyptic number.

81040588110242 is a deficient number, since it is larger than the sum of its proper divisors (40547016619258).

81040588110242 is a wasteful number, since it uses less digits than its factorization.

81040588110242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8907521380.

The product of its (nonzero) digits is 163840, while the sum is 44.

The spelling of 81040588110242 in words is "eighty-one trillion, forty billion, five hundred eighty-eight million, one hundred ten thousand, two hundred forty-two".