81095351471 has 4 divisors (see below), whose sum is σ = 81502866000. Its totient is φ = 80687836944.

The previous prime is 81095351459. The next prime is 81095351473. The reversal of 81095351471 is 17415359018.

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

It is a cyclic number.

It is not a de Polignac number, because 81095351471 - 2¹⁰ = 81095350447 is a prime.

It is a super-3 number, since 3×81095351471³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81095351473) 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, 203756966 + ... + 203757363.

It is an arithmetic number, because the mean of its divisors is an integer number (20375716500).

Almost surely, 2^81095351471 is an apocalyptic number.

81095351471 is a deficient number, since it is larger than the sum of its proper divisors (407514529).

81095351471 is a wasteful number, since it uses less digits than its factorization.

81095351471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407514528.

The product of its (nonzero) digits is 151200, while the sum is 44.

The spelling of 81095351471 in words is "eighty-one billion, ninety-five million, three hundred fifty-one thousand, four hundred seventy-one".