51758590821 has 128 divisors (see below), whose sum is σ = 86964817920. Its totient is φ = 26726049792.

The previous prime is 51758590787. The next prime is 51758590843. The reversal of 51758590821 is 12809585715.

It is not a de Polignac number, because 51758590821 - 2¹⁴ = 51758574437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51758590021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 317537286 + ... + 317537448.

It is an arithmetic number, because the mean of its divisors is an integer number (679412640).

Almost surely, 2^51758590821 is an apocalyptic number.

It is an amenable number.

51758590821 is a deficient number, since it is larger than the sum of its proper divisors (35206227099).

51758590821 is a wasteful number, since it uses less digits than its factorization.

51758590821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523.

The product of its (nonzero) digits is 1008000, while the sum is 51.

The spelling of 51758590821 in words is "fifty-one billion, seven hundred fifty-eight million, five hundred ninety thousand, eight hundred twenty-one".