81672827255 has 4 divisors (see below), whose sum is σ = 98007392712. Its totient is φ = 65338261800.

The previous prime is 81672827239. The next prime is 81672827317. The reversal of 81672827255 is 55272827618.

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

It is not a de Polignac number, because 81672827255 - 2⁴ = 81672827239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81672827197 and 81672827206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8167282721 + ... + 8167282730.

It is an arithmetic number, because the mean of its divisors is an integer number (24501848178).

Almost surely, 2^81672827255 is an apocalyptic number.

81672827255 is a deficient number, since it is larger than the sum of its proper divisors (16334565457).

81672827255 is a wasteful number, since it uses less digits than its factorization.

81672827255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16334565456.

The product of its digits is 3763200, while the sum is 53.

The spelling of 81672827255 in words is "eighty-one billion, six hundred seventy-two million, eight hundred twenty-seven thousand, two hundred fifty-five".