85781496009 has 32 divisors (see below), whose sum is σ = 129195273600. Its totient is φ = 50149532160.

The previous prime is 85781495993. The next prime is 85781496019. The reversal of 85781496009 is 90069418758.

It is not a de Polignac number, because 85781496009 - 2⁴ = 85781495993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85781496009.

It is not an unprimeable number, because it can be changed into a prime (85781496019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1004997 + ... + 1087005.

It is an arithmetic number, because the mean of its divisors is an integer number (4037352300).

Almost surely, 2^85781496009 is an apocalyptic number.

It is an amenable number.

85781496009 is a deficient number, since it is larger than the sum of its proper divisors (43413777591).

85781496009 is a wasteful number, since it uses less digits than its factorization.

85781496009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83145.

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 85781496009 in words is "eighty-five billion, seven hundred eighty-one million, four hundred ninety-six thousand, nine".