64894799029 has 2 divisors, whose sum is σ = 64894799030. Its totient is φ = 64894799028.

The previous prime is 64894799009. The next prime is 64894799071. The reversal of 64894799029 is 92099749846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45252776529 + 19642022500 = 212727^2 + 140150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64894799029 is a prime.

It is a super-2 number, since 2×64894799029² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64894799009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32447399514 + 32447399515.

It is an arithmetic number, because the mean of its divisors is an integer number (32447399515).

Almost surely, 2^64894799029 is an apocalyptic number.

It is an amenable number.

64894799029 is a deficient number, since it is larger than the sum of its proper divisors (1).

64894799029 is an equidigital number, since it uses as much as digits as its factorization.

64894799029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70543872, while the sum is 67.

The spelling of 64894799029 in words is "sixty-four billion, eight hundred ninety-four million, seven hundred ninety-nine thousand, twenty-nine".