985718591659 has 2 divisors, whose sum is σ = 985718591660. Its totient is φ = 985718591658.

The previous prime is 985718591651. The next prime is 985718591723. The reversal of 985718591659 is 956195817589.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 985718591659 - 2³ = 985718591651 is a prime.

It is a super-2 number, since 2×985718591659² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 985718591591 and 985718591600.

It is not a weakly prime, because it can be changed into another prime (985718591651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492859295829 + 492859295830.

It is an arithmetic number, because the mean of its divisors is an integer number (492859295830).

Almost surely, 2^985718591659 is an apocalyptic number.

985718591659 is a deficient number, since it is larger than the sum of its proper divisors (1).

985718591659 is an equidigital number, since it uses as much as digits as its factorization.

985718591659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944000, while the sum is 73.

The spelling of 985718591659 in words is "nine hundred eighty-five billion, seven hundred eighteen million, five hundred ninety-one thousand, six hundred fifty-nine".