64329505 has 16 divisors (see below), whose sum is σ = 82431360. Its totient is φ = 48077568.

The previous prime is 64329493. The next prime is 64329521. The reversal of 64329505 is 50592346.

64329505 = T₄₃₀ + T₄₃₁ + ... + T₇₇₄.

It is a cyclic number.

It is not a de Polignac number, because 64329505 - 2⁹ = 64328993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560 + ... + 11449.

It is an arithmetic number, because the mean of its divisors is an integer number (5151960).

Almost surely, 2^64329505 is an apocalyptic number.

It is an amenable number.

64329505 is a deficient number, since it is larger than the sum of its proper divisors (18101855).

64329505 is a wasteful number, since it uses less digits than its factorization.

64329505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13080.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 64329505 is about 8020.5676233045. The cubic root of 64329505 is about 400.6852940098.

The spelling of 64329505 in words is "sixty-four million, three hundred twenty-nine thousand, five hundred five".