13605277997 has 4 divisors (see below), whose sum is σ = 14321345280. Its totient is φ = 12889210716.

The previous prime is 13605277967. The next prime is 13605277999. The reversal of 13605277997 is 79977250631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13605277997 - 2¹⁰ = 13605276973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13605277999) 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, 358033613 + ... + 358033650.

It is an arithmetic number, because the mean of its divisors is an integer number (3580336320).

Almost surely, 2^13605277997 is an apocalyptic number.

It is an amenable number.

13605277997 is a deficient number, since it is larger than the sum of its proper divisors (716067283).

13605277997 is an equidigital number, since it uses as much as digits as its factorization.

13605277997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716067282.

The product of its (nonzero) digits is 5000940, while the sum is 56.

The spelling of 13605277997 in words is "thirteen billion, six hundred five million, two hundred seventy-seven thousand, nine hundred ninety-seven".