15894849851 has 4 divisors (see below), whose sum is σ = 16052224704. Its totient is φ = 15737475000.

The previous prime is 15894849847. The next prime is 15894849863.

15894849851 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 not a de Polignac number, because 15894849851 - 2² = 15894849847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15894849871) 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, 78687275 + ... + 78687476.

It is an arithmetic number, because the mean of its divisors is an integer number (4013056176).

Almost surely, 2^15894849851 is an apocalyptic number.

15894849851 is a deficient number, since it is larger than the sum of its proper divisors (157374853).

15894849851 is a wasteful number, since it uses less digits than its factorization.

15894849851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157374852.

The product of its digits is 16588800, while the sum is 62.

The spelling of 15894849851 in words is "fifteen billion, eight hundred ninety-four million, eight hundred forty-nine thousand, eight hundred fifty-one".