64035221969 has 2 divisors, whose sum is σ = 64035221970. Its totient is φ = 64035221968.

The previous prime is 64035221963. The next prime is 64035221977. The reversal of 64035221969 is 96912253046.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38463054400 + 25572167569 = 196120^2 + 159913^2 .

It is a cyclic number.

It is not a de Polignac number, because 64035221969 - 2²⁸ = 63766786513 is a prime.

It is a super-2 number, since 2×64035221969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64035221963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32017610984 + 32017610985.

It is an arithmetic number, because the mean of its divisors is an integer number (32017610985).

Almost surely, 2^64035221969 is an apocalyptic number.

It is an amenable number.

64035221969 is a deficient number, since it is larger than the sum of its proper divisors (1).

64035221969 is an equidigital number, since it uses as much as digits as its factorization.

64035221969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 64035221969 in words is "sixty-four billion, thirty-five million, two hundred twenty-one thousand, nine hundred sixty-nine".