51872183687 has 4 divisors (see below), whose sum is σ = 52722547416. Its totient is φ = 51021819960.

The previous prime is 51872183653. The next prime is 51872183711. The reversal of 51872183687 is 78638127815.

51872183687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51872183687 - 2¹² = 51872179591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51872183887) 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, 425181773 + ... + 425181894.

It is an arithmetic number, because the mean of its divisors is an integer number (13180636854).

Almost surely, 2^51872183687 is an apocalyptic number.

51872183687 is a deficient number, since it is larger than the sum of its proper divisors (850363729).

51872183687 is an equidigital number, since it uses as much as digits as its factorization.

51872183687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850363728.

The product of its digits is 4515840, while the sum is 56.

The spelling of 51872183687 in words is "fifty-one billion, eight hundred seventy-two million, one hundred eighty-three thousand, six hundred eighty-seven".