65039513381 has 2 divisors, whose sum is σ = 65039513382. Its totient is φ = 65039513380.

The previous prime is 65039513369. The next prime is 65039513401. The reversal of 65039513381 is 18331593056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62475002500 + 2564510881 = 249950^2 + 50641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65039513381 is a prime.

It is a super-2 number, since 2×65039513381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65039513281) 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 as a sum of consecutive naturals, namely, 32519756690 + 32519756691.

It is an arithmetic number, because the mean of its divisors is an integer number (32519756691).

Almost surely, 2^65039513381 is an apocalyptic number.

It is an amenable number.

65039513381 is a deficient number, since it is larger than the sum of its proper divisors (1).

65039513381 is an equidigital number, since it uses as much as digits as its factorization.

65039513381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 65039513381 in words is "sixty-five billion, thirty-nine million, five hundred thirteen thousand, three hundred eighty-one".