64439118553 has 2 divisors, whose sum is σ = 64439118554. Its totient is φ = 64439118552.

The previous prime is 64439118551. The next prime is 64439118587. The reversal of 64439118553 is 35581193446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62253743049 + 2185375504 = 249507^2 + 46748^2 .

It is a cyclic number.

It is not a de Polignac number, because 64439118553 - 2¹ = 64439118551 is a prime.

Together with 64439118551, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 64439118497 and 64439118506.

It is not a weakly prime, because it can be changed into another prime (64439118551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32219559276 + 32219559277.

It is an arithmetic number, because the mean of its divisors is an integer number (32219559277).

Almost surely, 2^64439118553 is an apocalyptic number.

It is an amenable number.

64439118553 is a deficient number, since it is larger than the sum of its proper divisors (1).

64439118553 is an equidigital number, since it uses as much as digits as its factorization.

64439118553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 49.

The spelling of 64439118553 in words is "sixty-four billion, four hundred thirty-nine million, one hundred eighteen thousand, five hundred fifty-three".