15851800027 has 24 divisors (see below), whose sum is σ = 18865267200. Its totient is φ = 13274810640.

The previous prime is 15851800009. The next prime is 15851800079. The reversal of 15851800027 is 72000815851.

It is a de Polignac number, because none of the positive numbers 2^k-15851800027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15851800007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1373752 + ... + 1385242.

It is an arithmetic number, because the mean of its divisors is an integer number (786052800).

Almost surely, 2^15851800027 is an apocalyptic number.

15851800027 is a deficient number, since it is larger than the sum of its proper divisors (3013467173).

15851800027 is a wasteful number, since it uses less digits than its factorization.

15851800027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12151 (or 12144 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 37.

The spelling of 15851800027 in words is "fifteen billion, eight hundred fifty-one million, eight hundred thousand, twenty-seven".