51773512913 has 6 divisors (see below), whose sum is σ = 52252868934. Its totient is φ = 51298514784.

The previous prime is 51773512907. The next prime is 51773512961. The reversal of 51773512913 is 31921537715.

It can be written as a sum of positive squares in 3 ways, for example, as 21096691009 + 30676821904 = 145247^2 + 175148^2 .

It is not a de Polignac number, because 51773512913 - 2⁸ = 51773512657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51773512013) 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 5 ways as a sum of consecutive naturals, for example, 2166956 + ... + 2190717.

It is an arithmetic number, because the mean of its divisors is an integer number (8708811489).

Almost surely, 2^51773512913 is an apocalyptic number.

It is an amenable number.

51773512913 is a deficient number, since it is larger than the sum of its proper divisors (479356021).

51773512913 is an equidigital number, since it uses as much as digits as its factorization.

51773512913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357891 (or 4357782 counting only the distinct ones).

The product of its digits is 198450, while the sum is 44.

The spelling of 51773512913 in words is "fifty-one billion, seven hundred seventy-three million, five hundred twelve thousand, nine hundred thirteen".