13538049499 has 16 divisors (see below), whose sum is σ = 15351033600. Its totient is φ = 11835658656.

The previous prime is 13538049491. The next prime is 13538049533. The reversal of 13538049499 is 99494083531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13538049499 - 2³ = 13538049491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13538049491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1447452 + ... + 1456774.

It is an arithmetic number, because the mean of its divisors is an integer number (959439600).

Almost surely, 2^13538049499 is an apocalyptic number.

13538049499 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13538049499 is a deficient number, since it is larger than the sum of its proper divisors (1812984101).

13538049499 is a wasteful number, since it uses less digits than its factorization.

13538049499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15234.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 13538049499 in words is "thirteen billion, five hundred thirty-eight million, forty-nine thousand, four hundred ninety-nine".