64894799009 has 2 divisors, whose sum is σ = 64894799010. Its totient is φ = 64894799008.

The previous prime is 64894798987. The next prime is 64894799029. The reversal of 64894799009 is 90099749846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62860518400 + 2034280609 = 250720^2 + 45103^2 .

It is a cyclic number.

It is not a de Polignac number, because 64894799009 - 2²⁸ = 64626363553 is a prime.

It is a super-2 number, since 2×64894799009² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64894799029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32447399504 + 32447399505.

It is an arithmetic number, because the mean of its divisors is an integer number (32447399505).

Almost surely, 2^64894799009 is an apocalyptic number.

It is an amenable number.

64894799009 is a deficient number, since it is larger than the sum of its proper divisors (1).

64894799009 is an equidigital number, since it uses as much as digits as its factorization.

64894799009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35271936, while the sum is 65.

The spelling of 64894799009 in words is "sixty-four billion, eight hundred ninety-four million, seven hundred ninety-nine thousand, nine".