985755707557589 has 4 divisors (see below), whose sum is σ = 985761013295724. Its totient is φ = 985750401819456.

The previous prime is 985755707557541. The next prime is 985755707557639.

985755707557589 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 955431500103025 + 30324207454564 = 30910055^2 + 5506742^2 .

It is a cyclic number.

It is not a de Polignac number, because 985755707557589 - 2²⁸ = 985755439122133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 985755707557498 and 985755707557507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985755707557519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2652590372 + ... + 2652961965.

It is an arithmetic number, because the mean of its divisors is an integer number (246440253323931).

Almost surely, 2^{985755707557589} is an apocalyptic number.

It is an amenable number.

985755707557589 is a deficient number, since it is larger than the sum of its proper divisors (5305738135).

985755707557589 is a wasteful number, since it uses less digits than its factorization.

985755707557589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305738134.

The product of its (nonzero) digits is 194481000000, while the sum is 92.

The spelling of 985755707557589 in words is "nine hundred eighty-five trillion, seven hundred fifty-five billion, seven hundred seven million, five hundred fifty-seven thousand, five hundred eighty-nine".