64705553 has 16 divisors (see below), whose sum is σ = 75116160. Its totient is φ = 55084800.

The previous prime is 64705523. The next prime is 64705573. The reversal of 64705553 is 35550746.

64705553 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 64705553 - 2⁸ = 64705297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64705513) 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, 42068 + ... + 43578.

It is an arithmetic number, because the mean of its divisors is an integer number (4694760).

Almost surely, 2^64705553 is an apocalyptic number.

It is an amenable number.

64705553 is a deficient number, since it is larger than the sum of its proper divisors (10410607).

64705553 is a wasteful number, since it uses less digits than its factorization.

64705553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768.

The product of its (nonzero) digits is 63000, while the sum is 35.

The square root of 64705553 is about 8043.9761934009. The cubic root of 64705553 is about 401.4645333940.

The spelling of 64705553 in words is "sixty-four million, seven hundred five thousand, five hundred fifty-three".