15381698549 has 16 divisors (see below), whose sum is σ = 18628921728. Its totient is φ = 12398249472.

The previous prime is 15381698543. The next prime is 15381698551. The reversal of 15381698549 is 94589618351.

It is not a de Polignac number, because 15381698549 - 2⁴ = 15381698533 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 (15381698543) 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 15 ways as a sum of consecutive naturals, for example, 87794 + ... + 196140.

It is an arithmetic number, because the mean of its divisors is an integer number (1164307608).

Almost surely, 2^15381698549 is an apocalyptic number.

It is an amenable number.

15381698549 is a deficient number, since it is larger than the sum of its proper divisors (3247223179).

15381698549 is a wasteful number, since it uses less digits than its factorization.

15381698549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109564.

The product of its digits is 9331200, while the sum is 59.

The spelling of 15381698549 in words is "fifteen billion, three hundred eighty-one million, six hundred ninety-eight thousand, five hundred forty-nine".