81826079275 has 24 divisors (see below), whose sum is σ = 102533053040. Its totient is φ = 64772991360.

The previous prime is 81826079267. The next prime is 81826079281. The reversal of 81826079275 is 57297062818.

It is not a de Polignac number, because 81826079275 - 2³ = 81826079267 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2042992 + ... + 2082658.

Almost surely, 2^81826079275 is an apocalyptic number.

81826079275 is a deficient number, since it is larger than the sum of its proper divisors (20706973765).

81826079275 is a wasteful number, since it uses less digits than its factorization.

81826079275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40543 (or 40538 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 81826079275 in words is "eighty-one billion, eight hundred twenty-six million, seventy-nine thousand, two hundred seventy-five".