15842205109 has 4 divisors (see below), whose sum is σ = 16110717120. Its totient is φ = 15573693100.

The previous prime is 15842205097. The next prime is 15842205133. The reversal of 15842205109 is 90150224851.

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 not a de Polignac number, because 15842205109 - 2¹⁵ = 15842172341 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 (15842205199) 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, 134255917 + ... + 134256034.

It is an arithmetic number, because the mean of its divisors is an integer number (4027679280).

Almost surely, 2^15842205109 is an apocalyptic number.

It is an amenable number.

15842205109 is a deficient number, since it is larger than the sum of its proper divisors (268512011).

15842205109 is an equidigital number, since it uses as much as digits as its factorization.

15842205109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268512010.

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 15842205109 in words is "fifteen billion, eight hundred forty-two million, two hundred five thousand, one hundred nine".