64646164329 has 4 divisors (see below), whose sum is σ = 86194885776. Its totient is φ = 43097442884.

The previous prime is 64646164321. The next prime is 64646164343. The reversal of 64646164329 is 92346164646.

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.

It is a cyclic number.

It is not a de Polignac number, because 64646164329 - 2³ = 64646164321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64646164321) 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, 10774360719 + ... + 10774360724.

It is an arithmetic number, because the mean of its divisors is an integer number (21548721444).

Almost surely, 2^64646164329 is an apocalyptic number.

It is an amenable number.

64646164329 is a deficient number, since it is larger than the sum of its proper divisors (21548721447).

64646164329 is a wasteful number, since it uses less digits than its factorization.

64646164329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21548721446.

The product of its digits is 4478976, while the sum is 51.

The spelling of 64646164329 in words is "sixty-four billion, six hundred forty-six million, one hundred sixty-four thousand, three hundred twenty-nine".