64449867 has 8 divisors (see below), whose sum is σ = 86244496. Its totient is φ = 42810912.

The previous prime is 64449863. The next prime is 64449877. The reversal of 64449867 is 76894446.

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

It is not a de Polignac number, because 64449867 - 2² = 64449863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64449863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37948 + ... + 39609.

It is an arithmetic number, because the mean of its divisors is an integer number (10780562).

Almost surely, 2^64449867 is an apocalyptic number.

64449867 is a deficient number, since it is larger than the sum of its proper divisors (21794629).

64449867 is a wasteful number, since it uses less digits than its factorization.

64449867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77837.

The product of its digits is 1161216, while the sum is 48.

The square root of 64449867 is about 8028.0674511367. The cubic root of 64449867 is about 400.9350354852.

The spelling of 64449867 in words is "sixty-four million, four hundred forty-nine thousand, eight hundred sixty-seven".