81753211111 has 8 divisors (see below), whose sum is σ = 96045730704. Its totient is φ = 68604093120.

The previous prime is 81753211091. The next prime is 81753211117. The reversal of 81753211111 is 11111235718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81753211111 - 2⁹ = 81753210599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81753211117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285850246 + ... + 285850531.

It is an arithmetic number, because the mean of its divisors is an integer number (12005716338).

Almost surely, 2^81753211111 is an apocalyptic number.

81753211111 is a deficient number, since it is larger than the sum of its proper divisors (14292519593).

81753211111 is a wasteful number, since it uses less digits than its factorization.

81753211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571700801.

The product of its digits is 1680, while the sum is 31.

Adding to 81753211111 its reverse (11111235718), we get a palindrome (92864446829).

The spelling of 81753211111 in words is "eighty-one billion, seven hundred fifty-three million, two hundred eleven thousand, one hundred eleven".