985113537409 has 4 divisors (see below), whose sum is σ = 1009140696900. Its totient is φ = 961086377920.

The previous prime is 985113537391. The next prime is 985113537451. The reversal of 985113537409 is 904735311589.

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 197022352384 + 788091185025 = 443872^2 + 887745^2 .

It is a cyclic number.

It is not a de Polignac number, because 985113537409 - 2³⁵ = 950753799041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 985113537409.

It is not an unprimeable number, because it can be changed into a prime (985113537479) 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, 12013579684 + ... + 12013579765.

It is an arithmetic number, because the mean of its divisors is an integer number (252285174225).

Almost surely, 2^985113537409 is an apocalyptic number.

It is an amenable number.

985113537409 is a deficient number, since it is larger than the sum of its proper divisors (24027159491).

985113537409 is a wasteful number, since it uses less digits than its factorization.

985113537409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24027159490.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 985113537409 in words is "nine hundred eighty-five billion, one hundred thirteen million, five hundred thirty-seven thousand, four hundred nine".