64404053508161 has 2 divisors, whose sum is σ = 64404053508162. Its totient is φ = 64404053508160.

The previous prime is 64404053508121. The next prime is 64404053508169. The reversal of 64404053508161 is 16180535040446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62907994279936 + 1496059228225 = 7931456^2 + 1223135^2 .

It is a cyclic number.

It is not a de Polignac number, because 64404053508161 - 2¹⁸ = 64404053246017 is a prime.

It is a super-2 number, since 2×64404053508161² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64404053508169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32202026754080 + 32202026754081.

It is an arithmetic number, because the mean of its divisors is an integer number (32202026754081).

Almost surely, 2^{64404053508161} is an apocalyptic number.

It is an amenable number.

64404053508161 is a deficient number, since it is larger than the sum of its proper divisors (1).

64404053508161 is an equidigital number, since it uses as much as digits as its factorization.

64404053508161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 64404053508161 in words is "sixty-four trillion, four hundred four billion, fifty-three million, five hundred eight thousand, one hundred sixty-one".