13773137985 has 24 divisors (see below), whose sum is σ = 24005350824. Its totient is φ = 7305085440.

The previous prime is 13773137971. The next prime is 13773137993. The reversal of 13773137985 is 58973137731.

It can be written as a sum of positive squares in 4 ways, for example, as 293231376 + 13479906609 = 17124^2 + 116103^2 .

It is not a de Polignac number, because 13773137985 - 2⁵ = 13773137953 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 837352 + ... + 853641.

It is an arithmetic number, because the mean of its divisors is an integer number (1000222951).

Almost surely, 2^13773137985 is an apocalyptic number.

13773137985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13773137985 is a deficient number, since it is larger than the sum of its proper divisors (10232212839).

13773137985 is a wasteful number, since it uses less digits than its factorization.

13773137985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691185 (or 1691182 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 54.

The spelling of 13773137985 in words is "thirteen billion, seven hundred seventy-three million, one hundred thirty-seven thousand, nine hundred eighty-five".