51468635689 has 9 divisors (see below), whose sum is σ = 53311430263. Its totient is φ = 49687502872.

The previous prime is 51468635677. The next prime is 51468635707. The reversal of 51468635689 is 98653686415.

The square root of 51468635689 is 226867.

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

It can be written as a sum of positive squares in only one way, i.e., 26988904089 + 24479731600 = 164283^2 + 156460^2 .

It is not a de Polignac number, because 51468635689 - 2⁹ = 51468635177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51468635609) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6575232 + ... + 6583054.

Almost surely, 2^51468635689 is an apocalyptic number.

51468635689 is the 226867-th square number.

51468635689 is the 113434-th centered octagonal number.

It is an amenable number.

51468635689 is a deficient number, since it is larger than the sum of its proper divisors (1842794574).

51468635689 is an frugal number, since it uses more digits than its factorization.

51468635689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15704 (or 7852 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 61.

The spelling of 51468635689 in words is "fifty-one billion, four hundred sixty-eight million, six hundred thirty-five thousand, six hundred eighty-nine".