64694545 has 8 divisors (see below), whose sum is σ = 78506280. Its totient is φ = 51173760.

The previous prime is 64694543. The next prime is 64694549. The reversal of 64694545 is 54549646.

64694545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 36864 + 64657681 = 192^2 + 8041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64694545 - 2¹ = 64694543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64694543) 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, 72246 + ... + 73135.

It is an arithmetic number, because the mean of its divisors is an integer number (9813285).

Almost surely, 2^64694545 is an apocalyptic number.

It is an amenable number.

64694545 is a deficient number, since it is larger than the sum of its proper divisors (13811735).

64694545 is a wasteful number, since it uses less digits than its factorization.

64694545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145475.

The product of its digits is 518400, while the sum is 43.

The square root of 64694545 is about 8043.2919255738. The cubic root of 64694545 is about 401.4417657848.

The spelling of 64694545 in words is "sixty-four million, six hundred ninety-four thousand, five hundred forty-five".