51363668 has 18 divisors (see below), whose sum is σ = 91855386. Its totient is φ = 25131088.

The previous prime is 51363617. The next prime is 51363673. The reversal of 51363668 is 86636315.

It can be written as a sum of positive squares in only one way, i.e., 47087044 + 4276624 = 6862^2 + 2068^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5930 + ... + 11742.

It is an arithmetic number, because the mean of its divisors is an integer number (5103077).

Almost surely, 2^51363668 is an apocalyptic number.

It is an amenable number.

51363668 is a deficient number, since it is larger than the sum of its proper divisors (40491718).

51363668 is a wasteful number, since it uses less digits than its factorization.

51363668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5911 (or 5862 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 51363668 is about 7166.8450520435. The cubic root of 51363668 is about 371.7223522732.

The spelling of 51363668 in words is "fifty-one million, three hundred sixty-three thousand, six hundred sixty-eight".