65131020613 has 2 divisors, whose sum is σ = 65131020614. Its totient is φ = 65131020612.

The previous prime is 65131020601. The next prime is 65131020629. The reversal of 65131020613 is 31602013156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54771445089 + 10359575524 = 234033^2 + 101782^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65131020613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65131020673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32565510306 + 32565510307.

It is an arithmetic number, because the mean of its divisors is an integer number (32565510307).

Almost surely, 2^65131020613 is an apocalyptic number.

It is an amenable number.

65131020613 is a deficient number, since it is larger than the sum of its proper divisors (1).

65131020613 is an equidigital number, since it uses as much as digits as its factorization.

65131020613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

Adding to 65131020613 its reverse (31602013156), we get a palindrome (96733033769).

The spelling of 65131020613 in words is "sixty-five billion, one hundred thirty-one million, twenty thousand, six hundred thirteen".