51640530553 has 12 divisors (see below), whose sum is σ = 52892388720. Its totient is φ = 50417661336.

The previous prime is 51640530533. The next prime is 51640530611. The reversal of 51640530553 is 35503504615.

It is not a de Polignac number, because 51640530553 - 2⁹ = 51640530041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51640530503) 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 11 ways as a sum of consecutive naturals, for example, 5695938 + ... + 5704996.

It is an arithmetic number, because the mean of its divisors is an integer number (4407699060).

Almost surely, 2^51640530553 is an apocalyptic number.

It is an amenable number.

51640530553 is a deficient number, since it is larger than the sum of its proper divisors (1251858167).

51640530553 is an equidigital number, since it uses as much as digits as its factorization.

51640530553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12228 (or 12185 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 37.

The spelling of 51640530553 in words is "fifty-one billion, six hundred forty million, five hundred thirty thousand, five hundred fifty-three".