15806843849 has 16 divisors (see below), whose sum is σ = 16650816000. Its totient is φ = 14984948160.

The previous prime is 15806843837. The next prime is 15806843873. The reversal of 15806843849 is 94834860851.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 15806843849 - 2²⁸ = 15538408393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15806843794 and 15806843803.

It is not an unprimeable number, because it can be changed into a prime (15806840849) 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, 395612 + ... + 433730.

It is an arithmetic number, because the mean of its divisors is an integer number (1040676000).

Almost surely, 2^15806843849 is an apocalyptic number.

It is an amenable number.

15806843849 is a deficient number, since it is larger than the sum of its proper divisors (843972151).

15806843849 is a wasteful number, since it uses less digits than its factorization.

15806843849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38408.

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 15806843849 in words is "fifteen billion, eight hundred six million, eight hundred forty-three thousand, eight hundred forty-nine".