15851800028 has 12 divisors (see below), whose sum is σ = 28635509952. Its totient is φ = 7670225760.

The previous prime is 15851800009. The next prime is 15851800079. The reversal of 15851800028 is 82000815851.

It is a junction number, because it is equal to n+sod(n) for n = 15851799964 and 15851800000.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 63918425 + ... + 63918672.

It is an arithmetic number, because the mean of its divisors is an integer number (2386292496).

Almost surely, 2^15851800028 is an apocalyptic number.

It is an amenable number.

15851800028 is a deficient number, since it is larger than the sum of its proper divisors (12783709924).

15851800028 is a wasteful number, since it uses less digits than its factorization.

15851800028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127837132 (or 127837130 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 38.

The spelling of 15851800028 in words is "fifteen billion, eight hundred fifty-one million, eight hundred thousand, twenty-eight".