81011731283 has 4 divisors (see below), whose sum is σ = 92584835760. Its totient is φ = 69438626808.

The previous prime is 81011731271. The next prime is 81011731319. The reversal of 81011731283 is 38213711018.

It is a happy number.

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 81011731283 - 2¹² = 81011727187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81011734283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5786552228 + ... + 5786552241.

It is an arithmetic number, because the mean of its divisors is an integer number (23146208940).

Almost surely, 2^81011731283 is an apocalyptic number.

81011731283 is a deficient number, since it is larger than the sum of its proper divisors (11573104477).

81011731283 is a wasteful number, since it uses less digits than its factorization.

81011731283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11573104476.

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 81011731283 in words is "eighty-one billion, eleven million, seven hundred thirty-one thousand, two hundred eighty-three".