64339312765129 has 4 divisors (see below), whose sum is σ = 66557909757060. Its totient is φ = 62120715773200.

The previous prime is 64339312765081. The next prime is 64339312765229. The reversal of 64339312765129 is 92156721393346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21629689497529 + 42709623267600 = 4650773^2 + 6535260^2 .

It is a cyclic number.

It is not a de Polignac number, because 64339312765129 - 2⁷ = 64339312765001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64339312765229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109298495922 + ... + 1109298495979.

It is an arithmetic number, because the mean of its divisors is an integer number (16639477439265).

Almost surely, 2^{64339312765129} is an apocalyptic number.

It is an amenable number.

64339312765129 is a deficient number, since it is larger than the sum of its proper divisors (2218596991931).

64339312765129 is a wasteful number, since it uses less digits than its factorization.

64339312765129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218596991930.

The product of its digits is 44089920, while the sum is 61.

The spelling of 64339312765129 in words is "sixty-four trillion, three hundred thirty-nine billion, three hundred twelve million, seven hundred sixty-five thousand, one hundred twenty-nine".