81746727256 has 48 divisors (see below), whose sum is σ = 162615038040. Its totient is φ = 38501272320.

The previous prime is 81746727241. The next prime is 81746727281. The reversal of 81746727256 is 65272764718.

It is a junction number, because it is equal to n+sod(n) for n = 81746727197 and 81746727206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127675 + ... + 424021.

Almost surely, 2^81746727256 is an apocalyptic number.

It is an amenable number.

81746727256 is a deficient number, since it is larger than the sum of its proper divisors (80868310784).

81746727256 is a wasteful number, since it uses less digits than its factorization.

81746727256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296452 (or 296419 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 55.

The spelling of 81746727256 in words is "eighty-one billion, seven hundred forty-six million, seven hundred twenty-seven thousand, two hundred fifty-six".