13177923985 has 8 divisors (see below), whose sum is σ = 15872296680. Its totient is φ = 10503147264.

The previous prime is 13177923971. The next prime is 13177923989. The reversal of 13177923985 is 58932977131.

It can be written as a sum of positive squares in 4 ways, for example, as 289544256 + 12888379729 = 17016^2 + 113527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13177923985 - 2¹¹ = 13177921937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13177923989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4897512 + ... + 4900201.

It is an arithmetic number, because the mean of its divisors is an integer number (1984037085).

Almost surely, 2^13177923985 is an apocalyptic number.

It is an amenable number.

13177923985 is a deficient number, since it is larger than the sum of its proper divisors (2694372695).

13177923985 is an equidigital number, since it uses as much as digits as its factorization.

13177923985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9797987.

The product of its digits is 2857680, while the sum is 55.

The spelling of 13177923985 in words is "thirteen billion, one hundred seventy-seven million, nine hundred twenty-three thousand, nine hundred eighty-five".