64647434 has 16 divisors (see below), whose sum is σ = 102850560. Its totient is φ = 30410160.

The previous prime is 64647403. The next prime is 64647437. The reversal of 64647434 is 43474646.

64647434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64647437) 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 7 ways as a sum of consecutive naturals, for example, 8714 + ... + 14325.

It is an arithmetic number, because the mean of its divisors is an integer number (6428160).

Almost surely, 2^64647434 is an apocalyptic number.

64647434 is a deficient number, since it is larger than the sum of its proper divisors (38203126).

64647434 is a wasteful number, since it uses less digits than its factorization.

64647434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23125.

The product of its digits is 193536, while the sum is 38.

The square root of 64647434 is about 8040.3628027596. The cubic root of 64647434 is about 401.3442979299.

The spelling of 64647434 in words is "sixty-four million, six hundred forty-seven thousand, four hundred thirty-four".