81850283759 has 8 divisors (see below), whose sum is σ = 82394073840. Its totient is φ = 81306778176.

The previous prime is 81850283693. The next prime is 81850283777. The reversal of 81850283759 is 95738205818.

It is a happy number.

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

It is not a de Polignac number, because 81850283759 - 2³⁶ = 13130807023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81850288759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522572 + ... + 660894.

It is an arithmetic number, because the mean of its divisors is an integer number (10299259230).

Almost surely, 2^81850283759 is an apocalyptic number.

81850283759 is a deficient number, since it is larger than the sum of its proper divisors (543790081).

81850283759 is a wasteful number, since it uses less digits than its factorization.

81850283759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142249.

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 81850283759 in words is "eighty-one billion, eight hundred fifty million, two hundred eighty-three thousand, seven hundred fifty-nine".