15864046851 has 16 divisors (see below), whose sum is σ = 21788253344. Its totient is φ = 10259633664.

The previous prime is 15864046831. The next prime is 15864046879.

15864046851 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 15864046851 - 2¹⁴ = 15864030467 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 15864046851.

It is not an unprimeable number, because it can be changed into a prime (15864046831) 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, 174640 + ... + 249453.

It is an arithmetic number, because the mean of its divisors is an integer number (1361765834).

Almost surely, 2^15864046851 is an apocalyptic number.

15864046851 is a deficient number, since it is larger than the sum of its proper divisors (5924206493).

15864046851 is a wasteful number, since it uses less digits than its factorization.

15864046851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424470.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 15864046851 in words is "fifteen billion, eight hundred sixty-four million, forty-six thousand, eight hundred fifty-one".