64649146699 has 4 divisors (see below), whose sum is σ = 64649911936. Its totient is φ = 64648381464.

The previous prime is 64649146663. The next prime is 64649146777. The reversal of 64649146699 is 99664194646.

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

It is a cyclic number.

It is not a de Polignac number, because 64649146699 - 2²⁵ = 64615592267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64649146699.

It is not an unprimeable number, because it can be changed into a prime (64649116699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237564 + ... + 430969.

It is an arithmetic number, because the mean of its divisors is an integer number (16162477984).

Almost surely, 2^64649146699 is an apocalyptic number.

64649146699 is a deficient number, since it is larger than the sum of its proper divisors (765237).

64649146699 is an equidigital number, since it uses as much as digits as its factorization.

64649146699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765236.

The product of its digits is 60466176, while the sum is 64.

The spelling of 64649146699 in words is "sixty-four billion, six hundred forty-nine million, one hundred forty-six thousand, six hundred ninety-nine".