51355306523775 has 24 divisors (see below), whose sum is σ = 84909029184144. Its totient is φ = 27388984211200.

The previous prime is 51355306523657. The next prime is 51355306523789. The reversal of 51355306523775 is 57732560355315.

It is a happy number.

It is not a de Polignac number, because 51355306523775 - 2¹² = 51355306519679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2356416 + ... + 10404965.

It is an arithmetic number, because the mean of its divisors is an integer number (3537876216006).

Almost surely, 2^{51355306523775} is an apocalyptic number.

51355306523775 is a deficient number, since it is larger than the sum of its proper divisors (33553722660369).

51355306523775 is a wasteful number, since it uses less digits than its factorization.

51355306523775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12815051 (or 12815046 counting only the distinct ones).

The product of its (nonzero) digits is 49612500, while the sum is 57.

The spelling of 51355306523775 in words is "fifty-one trillion, three hundred fifty-five billion, three hundred six million, five hundred twenty-three thousand, seven hundred seventy-five".