64738745329 has 2 divisors, whose sum is σ = 64738745330. Its totient is φ = 64738745328.

The previous prime is 64738745297. The next prime is 64738745387. The reversal of 64738745329 is 92354783746.

It is an a-pointer prime, because the next prime (64738745387) can be obtained adding 64738745329 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64629333729 + 109411600 = 254223^2 + 10460^2 .

It is a cyclic number.

It is not a de Polignac number, because 64738745329 - 2⁵ = 64738745297 is a prime.

It is a super-2 number, since 2×64738745329² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64738746329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32369372664 + 32369372665.

It is an arithmetic number, because the mean of its divisors is an integer number (32369372665).

Almost surely, 2^64738745329 is an apocalyptic number.

It is an amenable number.

64738745329 is a deficient number, since it is larger than the sum of its proper divisors (1).

64738745329 is an equidigital number, since it uses as much as digits as its factorization.

64738745329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 58.

The spelling of 64738745329 in words is "sixty-four billion, seven hundred thirty-eight million, seven hundred forty-five thousand, three hundred twenty-nine".