51756260521 has 32 divisors (see below), whose sum is σ = 64690513920. Its totient is φ = 40380595200.

The previous prime is 51756260519. The next prime is 51756260533. The reversal of 51756260521 is 12506265715.

51756260521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51756260521 - 2¹ = 51756260519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51756260921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7629151 + ... + 7635931.

It is an arithmetic number, because the mean of its divisors is an integer number (2021578560).

Almost surely, 2^51756260521 is an apocalyptic number.

It is an amenable number.

51756260521 is a deficient number, since it is larger than the sum of its proper divisors (12934253399).

51756260521 is a wasteful number, since it uses less digits than its factorization.

51756260521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8905.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 51756260521 in words is "fifty-one billion, seven hundred fifty-six million, two hundred sixty thousand, five hundred twenty-one".