64796365421 has 2 divisors, whose sum is σ = 64796365422. Its totient is φ = 64796365420.

The previous prime is 64796365411. The next prime is 64796365471. The reversal of 64796365421 is 12456369746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53689524100 + 11106841321 = 231710^2 + 105389^2 .

It is a cyclic number.

It is not a de Polignac number, because 64796365421 - 2²² = 64792171117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64796365411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32398182710 + 32398182711.

It is an arithmetic number, because the mean of its divisors is an integer number (32398182711).

Almost surely, 2^64796365421 is an apocalyptic number.

It is an amenable number.

64796365421 is a deficient number, since it is larger than the sum of its proper divisors (1).

64796365421 is an equidigital number, since it uses as much as digits as its factorization.

64796365421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 53.

The spelling of 64796365421 in words is "sixty-four billion, seven hundred ninety-six million, three hundred sixty-five thousand, four hundred twenty-one".