64893430369 has 2 divisors, whose sum is σ = 64893430370. Its totient is φ = 64893430368.

The previous prime is 64893430351. The next prime is 64893430379. The reversal of 64893430369 is 96303439846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63383097600 + 1510332769 = 251760^2 + 38863^2 .

It is a cyclic number.

It is not a de Polignac number, because 64893430369 - 2⁵ = 64893430337 is a prime.

It is a super-2 number, since 2×64893430369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64893430379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32446715184 + 32446715185.

It is an arithmetic number, because the mean of its divisors is an integer number (32446715185).

Almost surely, 2^64893430369 is an apocalyptic number.

It is an amenable number.

64893430369 is a deficient number, since it is larger than the sum of its proper divisors (1).

64893430369 is an equidigital number, since it uses as much as digits as its factorization.

64893430369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 55.

The spelling of 64893430369 in words is "sixty-four billion, eight hundred ninety-three million, four hundred thirty thousand, three hundred sixty-nine".