81071183275 has 12 divisors (see below), whose sum is σ = 100919435832. Its totient is φ = 64604579840.

The previous prime is 81071183273. The next prime is 81071183293. The reversal of 81071183275 is 57238117018.

It is not a de Polignac number, because 81071183275 - 2¹ = 81071183273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81071183273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6302617 + ... + 6315466.

It is an arithmetic number, because the mean of its divisors is an integer number (8409952986).

Almost surely, 2^81071183275 is an apocalyptic number.

81071183275 is a deficient number, since it is larger than the sum of its proper divisors (19848252557).

81071183275 is a wasteful number, since it uses less digits than its factorization.

81071183275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12618350 (or 12618345 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 43.

The spelling of 81071183275 in words is "eighty-one billion, seventy-one million, one hundred eighty-three thousand, two hundred seventy-five".