64430448377 has 2 divisors, whose sum is σ = 64430448378. Its totient is φ = 64430448376.

The previous prime is 64430448373. The next prime is 64430448431. The reversal of 64430448377 is 77384403446.

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., 42256558096 + 22173890281 = 205564^2 + 148909^2 .

It is a cyclic number.

It is not a de Polignac number, because 64430448377 - 2² = 64430448373 is a prime.

It is a super-2 number, since 2×64430448377² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64430448373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32215224188 + 32215224189.

It is an arithmetic number, because the mean of its divisors is an integer number (32215224189).

Almost surely, 2^64430448377 is an apocalyptic number.

It is an amenable number.

64430448377 is a deficient number, since it is larger than the sum of its proper divisors (1).

64430448377 is an equidigital number, since it uses as much as digits as its factorization.

64430448377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5419008, while the sum is 50.

The spelling of 64430448377 in words is "sixty-four billion, four hundred thirty million, four hundred forty-eight thousand, three hundred seventy-seven".