64385141309 has 4 divisors (see below), whose sum is σ = 64385653920. Its totient is φ = 64384628700.

The previous prime is 64385141299. The next prime is 64385141329. The reversal of 64385141309 is 90314158346.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90314158346 = 2 ⋅45157079173.

It is a cyclic number.

It is not a de Polignac number, because 64385141309 - 2¹⁶ = 64385075773 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 64385141309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64385141329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73922 + ... + 366380.

It is an arithmetic number, because the mean of its divisors is an integer number (16096413480).

Almost surely, 2^64385141309 is an apocalyptic number.

It is an amenable number.

64385141309 is a deficient number, since it is larger than the sum of its proper divisors (512611).

64385141309 is a wasteful number, since it uses less digits than its factorization.

64385141309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512610.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 64385141309 in words is "sixty-four billion, three hundred eighty-five million, one hundred forty-one thousand, three hundred nine".