13519949849 has 4 divisors (see below), whose sum is σ = 15451371264. Its totient is φ = 11588528436.

The previous prime is 13519949837. The next prime is 13519949851. The reversal of 13519949849 is 94894991531.

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 13519949849 - 2³² = 9224982553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13519949791 and 13519949800.

It is not an unprimeable number, because it can be changed into a prime (13519949809) 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, 965710697 + ... + 965710710.

It is an arithmetic number, because the mean of its divisors is an integer number (3862842816).

Almost surely, 2^13519949849 is an apocalyptic number.

It is an amenable number.

13519949849 is a deficient number, since it is larger than the sum of its proper divisors (1931421415).

13519949849 is an equidigital number, since it uses as much as digits as its factorization.

13519949849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931421414.

The product of its digits is 12597120, while the sum is 62.

The spelling of 13519949849 in words is "thirteen billion, five hundred nineteen million, nine hundred forty-nine thousand, eight hundred forty-nine".