64165533405 has 32 divisors (see below), whose sum is σ = 105517223424. Its totient is φ = 33280106496.

The previous prime is 64165533389. The next prime is 64165533409. The reversal of 64165533405 is 50433556146.

It is not a de Polignac number, because 64165533405 - 2⁴ = 64165533389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64165533409) 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 31 ways as a sum of consecutive naturals, for example, 179172 + ... + 400541.

It is an arithmetic number, because the mean of its divisors is an integer number (3297413232).

Almost surely, 2^64165533405 is an apocalyptic number.

It is an amenable number.

64165533405 is a deficient number, since it is larger than the sum of its proper divisors (41351690019).

64165533405 is a wasteful number, since it uses less digits than its factorization.

64165533405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579925.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 64165533405 in words is "sixty-four billion, one hundred sixty-five million, five hundred thirty-three thousand, four hundred five".