985805387669 has 16 divisors (see below), whose sum is σ = 1006452203520. Its totient is φ = 965367486720.

The previous prime is 985805387657. The next prime is 985805387681. The reversal of 985805387669 is 966783508589.

It is an interprime number because it is at equal distance from previous prime (985805387657) and next prime (985805387681).

It is a cyclic number.

It is not a de Polignac number, because 985805387669 - 2¹⁶ = 985805322133 is a prime.

It is a super-2 number, since 2×985805387669² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 985805387596 and 985805387605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985805387639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37440029 + ... + 37466349.

It is an arithmetic number, because the mean of its divisors is an integer number (62903262720).

Almost surely, 2^985805387669 is an apocalyptic number.

It is an amenable number.

985805387669 is a deficient number, since it is larger than the sum of its proper divisors (20646815851).

985805387669 is a wasteful number, since it uses less digits than its factorization.

985805387669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30260.

The product of its (nonzero) digits is 783820800, while the sum is 74.

The spelling of 985805387669 in words is "nine hundred eighty-five billion, eight hundred five million, three hundred eighty-seven thousand, six hundred sixty-nine".