64569696329 has 4 divisors (see below), whose sum is σ = 64598485776. Its totient is φ = 64540906884.

The previous prime is 64569696287. The next prime is 64569696341. The reversal of 64569696329 is 92369696546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92369696546 = 2 ⋅46184848273.

It is a cyclic number.

It is not a de Polignac number, because 64569696329 - 2⁸ = 64569696073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64569696379) 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, 14391359 + ... + 14395844.

It is an arithmetic number, because the mean of its divisors is an integer number (16149621444).

Almost surely, 2^64569696329 is an apocalyptic number.

It is an amenable number.

64569696329 is a deficient number, since it is larger than the sum of its proper divisors (28789447).

64569696329 is a wasteful number, since it uses less digits than its factorization.

64569696329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28789446.

The product of its digits is 113374080, while the sum is 65.

The spelling of 64569696329 in words is "sixty-four billion, five hundred sixty-nine million, six hundred ninety-six thousand, three hundred twenty-nine".