81470880105 has 8 divisors (see below), whose sum is σ = 130353408192. Its totient is φ = 43451136048.

The previous prime is 81470880089. The next prime is 81470880131. The reversal of 81470880105 is 50108807418.

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

It is not a de Polignac number, because 81470880105 - 2⁴ = 81470880089 is a prime.

It is a super-2 number, since 2×81470880105² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2715695989 + ... + 2715696018.

It is an arithmetic number, because the mean of its divisors is an integer number (16294176024).

Almost surely, 2^81470880105 is an apocalyptic number.

It is an amenable number.

81470880105 is a deficient number, since it is larger than the sum of its proper divisors (48882528087).

81470880105 is a wasteful number, since it uses less digits than its factorization.

81470880105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5431392015.

The product of its (nonzero) digits is 71680, while the sum is 42.

The spelling of 81470880105 in words is "eighty-one billion, four hundred seventy million, eight hundred eighty thousand, one hundred five".