64193627409 has 16 divisors (see below), whose sum is σ = 85752490560. Its totient is φ = 42715321920.

The previous prime is 64193627339. The next prime is 64193627423. The reversal of 64193627409 is 90472639146.

It is a happy number.

It is not a de Polignac number, because 64193627409 - 2¹¹ = 64193625361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64193627479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4917439 + ... + 4930475.

It is an arithmetic number, because the mean of its divisors is an integer number (5359530660).

Almost surely, 2^64193627409 is an apocalyptic number.

It is an amenable number.

64193627409 is a deficient number, since it is larger than the sum of its proper divisors (21558863151).

64193627409 is a wasteful number, since it uses less digits than its factorization.

64193627409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16000.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 64193627409 in words is "sixty-four billion, one hundred ninety-three million, six hundred twenty-seven thousand, four hundred nine".