13991267577 has 36 divisors (see below), whose sum is σ = 21904391376. Its totient is φ = 7920672480.

The previous prime is 13991267573. The next prime is 13991267629. The reversal of 13991267577 is 77576219931.

It is not a de Polignac number, because 13991267577 - 2² = 13991267573 is a prime.

It is a super-2 number, since 2×13991267577² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13991267573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1742502 + ... + 1750512.

It is an arithmetic number, because the mean of its divisors is an integer number (608455316).

Almost surely, 2^13991267577 is an apocalyptic number.

It is an amenable number.

13991267577 is a deficient number, since it is larger than the sum of its proper divisors (7913123799).

13991267577 is an equidigital number, since it uses as much as digits as its factorization.

13991267577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8246 (or 8130 counting only the distinct ones).

The product of its digits is 5000940, while the sum is 57.

The spelling of 13991267577 in words is "thirteen billion, nine hundred ninety-one million, two hundred sixty-seven thousand, five hundred seventy-seven".