15556849871 has 8 divisors (see below), whose sum is σ = 16793002080. Its totient is φ = 14367344992.

The previous prime is 15556849843. The next prime is 15556849873. The reversal of 15556849871 is 17894865551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15556849871 - 2⁶ = 15556849807 is a prime.

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 15556849871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15556849873) 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 7 ways as a sum of consecutive naturals, for example, 11661140 + ... + 11662473.

It is an arithmetic number, because the mean of its divisors is an integer number (2099125260).

Almost surely, 2^15556849871 is an apocalyptic number.

15556849871 is a deficient number, since it is larger than the sum of its proper divisors (1236152209).

15556849871 is a wasteful number, since it uses less digits than its factorization.

15556849871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23323665.

The product of its digits is 12096000, while the sum is 59.

The spelling of 15556849871 in words is "fifteen billion, five hundred fifty-six million, eight hundred forty-nine thousand, eight hundred seventy-one".