51642563906768 has 40 divisors (see below), whose sum is σ = 101325396902400. Its totient is φ = 25494083282304.

The previous prime is 51642563906749. The next prime is 51642563906777. The reversal of 51642563906768 is 86760936524615.

It is a junction number, because it is equal to n+sod(n) for n = 51642563906698 and 51642563906707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109883930 + ... + 110352902.

It is an arithmetic number, because the mean of its divisors is an integer number (2533134922560).

It is a 1-persistent number, because it is pandigital, but 2⋅51642563906768 = 103285127813536 is not.

Almost surely, 2^{51642563906768} is an apocalyptic number.

It is an amenable number.

51642563906768 is a deficient number, since it is larger than the sum of its proper divisors (49682832995632).

51642563906768 is a wasteful number, since it uses less digits than its factorization.

51642563906768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556179 (or 556173 counting only the distinct ones).

The product of its (nonzero) digits is 391910400, while the sum is 68.

The spelling of 51642563906768 in words is "fifty-one trillion, six hundred forty-two billion, five hundred sixty-three million, nine hundred six thousand, seven hundred sixty-eight".