51145631716 has 27 divisors (see below), whose sum is σ = 90806367771. Its totient is φ = 25206220224.

The previous prime is 51145631683. The next prime is 51145631791. The reversal of 51145631716 is 61713654115.

The square root of 51145631716 is 226154.

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

51145631716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 477422500 + 50668209216 = 21850^2 + 225096^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 33017710 + ... + 33019258.

Almost surely, 2^51145631716 is an apocalyptic number.

51145631716 is the 226154-th square number.

It is an amenable number.

51145631716 is a deficient number, since it is larger than the sum of its proper divisors (39660736055).

51145631716 is an frugal number, since it uses more digits than its factorization.

51145631716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248 (or 1624 counting only the distinct ones).

The product of its digits is 75600, while the sum is 40.

The spelling of 51145631716 in words is "fifty-one billion, one hundred forty-five million, six hundred thirty-one thousand, seven hundred sixteen".