6109313985 has 12 divisors (see below), whose sum is σ = 10589477652. Its totient is φ = 3258300768.

The previous prime is 6109313929. The next prime is 6109313989. The reversal of 6109313985 is 5893139016.

It can be written as a sum of positive squares in 2 ways, for example, as 2037980736 + 4071333249 = 45144^2 + 63807^2 .

It is not a de Polignac number, because 6109313985 - 2⁷ = 6109313857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 135762533 = 6109313985 / (6 + 1 + 0 + 9 + 3 + 1 + 3 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 6109313985.

It is not an unprimeable number, because it can be changed into a prime (6109313989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67881222 + ... + 67881311.

It is an arithmetic number, because the mean of its divisors is an integer number (882456471).

Almost surely, 2^6109313985 is an apocalyptic number.

It is an amenable number.

6109313985 is a deficient number, since it is larger than the sum of its proper divisors (4480163667).

6109313985 is a wasteful number, since it uses less digits than its factorization.

6109313985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135762544 (or 135762541 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 6109313985 is about 78162.1006946461. The cubic root of 6109313985 is about 1828.0896170754.

It can be divided in two parts, 61093 and 13985, that added together give a triangular number (75078 = T₃₈₇).

The spelling of 6109313985 in words is "six billion, one hundred nine million, three hundred thirteen thousand, nine hundred eighty-five".