51758086634520 has 128 divisors (see below), whose sum is σ = 177457727370240. Its totient is φ = 11830324446720.

The previous prime is 51758086634503. The next prime is 51758086634557. The reversal of 51758086634520 is 2543668085715.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202701330 + ... + 202956510.

It is an arithmetic number, because the mean of its divisors is an integer number (1386388495080).

Almost surely, 2^{51758086634520} is an apocalyptic number.

It is an amenable number.

51758086634520 is an abundant number, since it is smaller than the sum of its proper divisors (125699640735720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51758086634520 is a wasteful number, since it uses less digits than its factorization.

51758086634520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496665 (or 496661 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 60.

The spelling of 51758086634520 in words is "fifty-one trillion, seven hundred fifty-eight billion, eighty-six million, six hundred thirty-four thousand, five hundred twenty".