64261329 has 16 divisors (see below), whose sum is σ = 93700800. Its totient is φ = 38850560.

The previous prime is 64261291. The next prime is 64261331. The reversal of 64261329 is 92316246.

64261329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64261329 - 2⁸ = 64261073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 64261329.

It is not an unprimeable number, because it can be changed into a prime (64261399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12649 + ... + 16985.

It is an arithmetic number, because the mean of its divisors is an integer number (5856300).

Almost surely, 2^64261329 is an apocalyptic number.

It is an amenable number.

64261329 is a deficient number, since it is larger than the sum of its proper divisors (29439471).

64261329 is a wasteful number, since it uses less digits than its factorization.

64261329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4800.

The product of its digits is 15552, while the sum is 33.

The square root of 64261329 is about 8016.3164233955. The cubic root of 64261329 is about 400.5436960683.

The spelling of 64261329 in words is "sixty-four million, two hundred sixty-one thousand, three hundred twenty-nine".