81172283082 has 16 divisors (see below), whose sum is σ = 177103163232. Its totient is φ = 24597661520.

The previous prime is 81172283063. The next prime is 81172283089. The reversal of 81172283082 is 28038227118.

It is not an unprimeable number, because it can be changed into a prime (81172283089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614941473 + ... + 614941604.

It is an arithmetic number, because the mean of its divisors is an integer number (11068947702).

Almost surely, 2^81172283082 is an apocalyptic number.

81172283082 is an abundant number, since it is smaller than the sum of its proper divisors (95930880150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81172283082 is a wasteful number, since it uses less digits than its factorization.

81172283082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229883093.

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 81172283082 in words is "eighty-one billion, one hundred seventy-two million, two hundred eighty-three thousand, eighty-two".