51728852187 has 24 divisors (see below), whose sum is σ = 76239912528. Its totient is φ = 33786043200.

The previous prime is 51728852171. The next prime is 51728852221. The reversal of 51728852187 is 78125882715.

51728852187 is a `hidden beast` number, since 5 + 17 + 28 + 8 + 521 + 87 = 666.

51728852187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51728852187 - 2⁴ = 51728852171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51728852107) 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, 251137 + ... + 408077.

It is an arithmetic number, because the mean of its divisors is an integer number (3176663022).

Almost surely, 2^51728852187 is an apocalyptic number.

51728852187 is a deficient number, since it is larger than the sum of its proper divisors (24511060341).

51728852187 is a wasteful number, since it uses less digits than its factorization.

51728852187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157691 (or 157688 counting only the distinct ones).

The product of its digits is 2508800, while the sum is 54.

The spelling of 51728852187 in words is "fifty-one billion, seven hundred twenty-eight million, eight hundred fifty-two thousand, one hundred eighty-seven".