81355677283 has 4 divisors (see below), whose sum is σ = 81356922288. Its totient is φ = 81354432280.

The previous prime is 81355677281. The next prime is 81355677323. The reversal of 81355677283 is 38277655318.

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

It is a cyclic number.

It is not a de Polignac number, because 81355677283 - 2¹ = 81355677281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81355677281) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 518716 + ... + 657097.

It is an arithmetic number, because the mean of its divisors is an integer number (20339230572).

Almost surely, 2^81355677283 is an apocalyptic number.

81355677283 is a deficient number, since it is larger than the sum of its proper divisors (1245005).

81355677283 is a wasteful number, since it uses less digits than its factorization.

81355677283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245004.

The product of its digits is 8467200, while the sum is 55.

The spelling of 81355677283 in words is "eighty-one billion, three hundred fifty-five million, six hundred seventy-seven thousand, two hundred eighty-three".