64433965 has 16 divisors (see below), whose sum is σ = 80372736. Its totient is φ = 49536000.

The previous prime is 64433947. The next prime is 64433987. The reversal of 64433965 is 56933446.

It is not a de Polignac number, because 64433965 - 2¹⁷ = 64302893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 22029 + ... + 24781.

It is an arithmetic number, because the mean of its divisors is an integer number (5023296).

Almost surely, 2^64433965 is an apocalyptic number.

It is an amenable number.

64433965 is a deficient number, since it is larger than the sum of its proper divisors (15938771).

64433965 is a wasteful number, since it uses less digits than its factorization.

64433965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940.

The product of its digits is 233280, while the sum is 40.

The square root of 64433965 is about 8027.0769897890. The cubic root of 64433965 is about 400.9020579494.

The spelling of 64433965 in words is "sixty-four million, four hundred thirty-three thousand, nine hundred sixty-five".