51658708481 has 16 divisors (see below), whose sum is σ = 53706352128. Its totient is φ = 49636108800.

The previous prime is 51658708471. The next prime is 51658708483. The reversal of 51658708481 is 18480785615.

It is not a de Polignac number, because 51658708481 - 2¹⁸ = 51658446337 is a prime.

It is a super-2 number, since 2×51658708481² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51658708483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2614961 + ... + 2634641.

It is an arithmetic number, because the mean of its divisors is an integer number (3356647008).

Almost surely, 2^51658708481 is an apocalyptic number.

It is an amenable number.

51658708481 is a deficient number, since it is larger than the sum of its proper divisors (2047643647).

51658708481 is a wasteful number, since it uses less digits than its factorization.

51658708481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20312.

The product of its (nonzero) digits is 2150400, while the sum is 53.

The spelling of 51658708481 in words is "fifty-one billion, six hundred fifty-eight million, seven hundred eight thousand, four hundred eighty-one".