65265563381 has 2 divisors, whose sum is σ = 65265563382. Its totient is φ = 65265563380.

The previous prime is 65265563273. The next prime is 65265563383. The reversal of 65265563381 is 18336556256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42532462756 + 22733100625 = 206234^2 + 150775^2 .

It is a cyclic number.

It is not a de Polignac number, because 65265563381 - 2²² = 65261369077 is a prime.

It is a super-2 number, since 2×65265563381² (a number of 22 digits) contains 22 as substring.

Together with 65265563383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65265563383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32632781690 + 32632781691.

It is an arithmetic number, because the mean of its divisors is an integer number (32632781691).

Almost surely, 2^65265563381 is an apocalyptic number.

It is an amenable number.

65265563381 is a deficient number, since it is larger than the sum of its proper divisors (1).

65265563381 is an equidigital number, since it uses as much as digits as its factorization.

65265563381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888000, while the sum is 50.

The spelling of 65265563381 in words is "sixty-five billion, two hundred sixty-five million, five hundred sixty-three thousand, three hundred eighty-one".