64302029921 has 2 divisors, whose sum is σ = 64302029922. Its totient is φ = 64302029920.

The previous prime is 64302029917. The next prime is 64302029923. The reversal of 64302029921 is 12992020346.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62519501521 + 1782528400 = 250039^2 + 42220^2 .

It is a cyclic number.

It is not a de Polignac number, because 64302029921 - 2² = 64302029917 is a prime.

It is a super-2 number, since 2×64302029921² (a number of 22 digits) contains 22 as substring.

Together with 64302029923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64302029923) 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, 32151014960 + 32151014961.

It is an arithmetic number, because the mean of its divisors is an integer number (32151014961).

Almost surely, 2^64302029921 is an apocalyptic number.

It is an amenable number.

64302029921 is a deficient number, since it is larger than the sum of its proper divisors (1).

64302029921 is an equidigital number, since it uses as much as digits as its factorization.

64302029921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 64302029921 in words is "sixty-four billion, three hundred two million, twenty-nine thousand, nine hundred twenty-one".