15549161309 has 24 divisors (see below), whose sum is σ = 17969788800. Its totient is φ = 13341283200.

The previous prime is 15549161281. The next prime is 15549161321. The reversal of 15549161309 is 90316194551.

It is not a de Polignac number, because 15549161309 - 2¹² = 15549157213 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15549161309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15549361309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1068917 + ... + 1083365.

It is an arithmetic number, because the mean of its divisors is an integer number (748741200).

Almost surely, 2^15549161309 is an apocalyptic number.

15549161309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

15549161309 is a deficient number, since it is larger than the sum of its proper divisors (2420627491).

15549161309 is a wasteful number, since it uses less digits than its factorization.

15549161309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14769 (or 14750 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 44.

The spelling of 15549161309 in words is "fifteen billion, five hundred forty-nine million, one hundred sixty-one thousand, three hundred nine".