64645449 has 16 divisors (see below), whose sum is σ = 94255104. Its totient is φ = 39085200.

The previous prime is 64645307. The next prime is 64645457. The reversal of 64645449 is 94454646.

It is not a de Polignac number, because 64645449 - 2¹³ = 64637257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64645449.

It is not an unprimeable number, because it can be changed into a prime (64645459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13164 + ... + 17394.

It is an arithmetic number, because the mean of its divisors is an integer number (5890944).

Almost surely, 2^64645449 is an apocalyptic number.

It is an amenable number.

64645449 is a deficient number, since it is larger than the sum of its proper divisors (29609655).

64645449 is a wasteful number, since it uses less digits than its factorization.

64645449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708.

The product of its digits is 414720, while the sum is 42.

The square root of 64645449 is about 8040.2393621086. The cubic root of 64645449 is about 401.3401901279.

The spelling of 64645449 in words is "sixty-four million, six hundred forty-five thousand, four hundred forty-nine".