65263643969 has 2 divisors, whose sum is σ = 65263643970. Its totient is φ = 65263643968.

The previous prime is 65263643941. The next prime is 65263644029. The reversal of 65263643969 is 96934636256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38293793344 + 26969850625 = 195688^2 + 164225^2 .

It is a cyclic number.

It is not a de Polignac number, because 65263643969 - 2⁸ = 65263643713 is a prime.

It is a super-2 number, since 2×65263643969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65263643069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32631821984 + 32631821985.

It is an arithmetic number, because the mean of its divisors is an integer number (32631821985).

Almost surely, 2^65263643969 is an apocalyptic number.

It is an amenable number.

65263643969 is a deficient number, since it is larger than the sum of its proper divisors (1).

65263643969 is an equidigital number, since it uses as much as digits as its factorization.

65263643969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37791360, while the sum is 59.

The spelling of 65263643969 in words is "sixty-five billion, two hundred sixty-three million, six hundred forty-three thousand, nine hundred sixty-nine".