15852825851 has 4 divisors (see below), whose sum is σ = 16112708304. Its totient is φ = 15592943400.

The previous prime is 15852825829. The next prime is 15852825853.

It is a happy number.

15852825851 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15852825851 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 15852825851.

It is not an unprimeable number, because it can be changed into a prime (15852825853) 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, 129941135 + ... + 129941256.

It is an arithmetic number, because the mean of its divisors is an integer number (4028177076).

Almost surely, 2^15852825851 is an apocalyptic number.

15852825851 is a deficient number, since it is larger than the sum of its proper divisors (259882453).

15852825851 is an equidigital number, since it uses as much as digits as its factorization.

15852825851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259882452.

The product of its digits is 1280000, while the sum is 50.

The spelling of 15852825851 in words is "fifteen billion, eight hundred fifty-two million, eight hundred twenty-five thousand, eight hundred fifty-one".