64969605121 has 2 divisors, whose sum is σ = 64969605122. Its totient is φ = 64969605120.

The previous prime is 64969605083. The next prime is 64969605139. The reversal of 64969605121 is 12150696946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45866218896 + 19103386225 = 214164^2 + 138215^2 .

It is a cyclic number.

It is not a de Polignac number, because 64969605121 - 2⁷ = 64969604993 is a prime.

It is not a weakly prime, because it can be changed into another prime (64969605161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32484802560 + 32484802561.

It is an arithmetic number, because the mean of its divisors is an integer number (32484802561).

Almost surely, 2^64969605121 is an apocalyptic number.

It is an amenable number.

64969605121 is a deficient number, since it is larger than the sum of its proper divisors (1).

64969605121 is an equidigital number, since it uses as much as digits as its factorization.

64969605121 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 49.

The spelling of 64969605121 in words is "sixty-four billion, nine hundred sixty-nine million, six hundred five thousand, one hundred twenty-one".