51686203716 has 81 divisors (see below), whose sum is σ = 152010133821. Its totient is φ = 14764758624.

The previous prime is 51686203711. The next prime is 51686203769. The reversal of 51686203716 is 61730268615.

The square root of 51686203716 is 227346.

It is a perfect power (a square), and thus also a powerful number.

51686203716 is a `hidden beast` number, since 5 + 1 + 6 + 8 + 620 + 3 + 7 + 16 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11246602500 + 40439601216 = 106050^2 + 201096^2 .

It is not an unprimeable number, because it can be changed into a prime (51686203711) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9545826 + ... + 9551238.

Almost surely, 2^51686203716 is an apocalyptic number.

51686203716 is the 227346-th square number.

It is an amenable number.

51686203716 is an abundant number, since it is smaller than the sum of its proper divisors (100323930105).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51686203716 is an equidigital number, since it uses as much as digits as its factorization.

51686203716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10850 (or 5425 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 51686203716 in words is "fifty-one billion, six hundred eighty-six million, two hundred three thousand, seven hundred sixteen".