64449675 has 54 divisors (see below), whose sum is σ = 120885492. Its totient is φ = 34039440.

The previous prime is 64449673. The next prime is 64449683. The reversal of 64449675 is 57694446.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 64449675 - 2¹ = 64449673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 64449675.

It is not an unprimeable number, because it can be changed into a prime (64449673) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 625674 + ... + 625776.

Almost surely, 2^64449675 is an apocalyptic number.

64449675 is a deficient number, since it is larger than the sum of its proper divisors (56435817).

64449675 is an equidigital number, since it uses as much as digits as its factorization.

64449675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 111 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 64449675 is about 8028.0554930817. The cubic root of 64449675 is about 400.9346373483.

The spelling of 64449675 in words is "sixty-four million, four hundred forty-nine thousand, six hundred seventy-five".