64404605441 has 4 divisors (see below), whose sum is σ = 70259569584. Its totient is φ = 58549641300.

The previous prime is 64404605431. The next prime is 64404605443. The reversal of 64404605441 is 14450640446.

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 64404605441 - 2¹⁰ = 64404604417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64404605395 and 64404605404.

It is not an unprimeable number, because it can be changed into a prime (64404605443) 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 3 ways as a sum of consecutive naturals, for example, 2927482055 + ... + 2927482076.

It is an arithmetic number, because the mean of its divisors is an integer number (17564892396).

Almost surely, 2^64404605441 is an apocalyptic number.

It is an amenable number.

64404605441 is a deficient number, since it is larger than the sum of its proper divisors (5854964143).

64404605441 is a wasteful number, since it uses less digits than its factorization.

64404605441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5854964142.

The product of its (nonzero) digits is 184320, while the sum is 38.

The spelling of 64404605441 in words is "sixty-four billion, four hundred four million, six hundred five thousand, four hundred forty-one".