64905549 has 8 divisors (see below), whose sum is σ = 88173792. Its totient is φ = 42453840.

The previous prime is 64905523. The next prime is 64905551. The reversal of 64905549 is 94550946.

It is a happy number.

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

It is not a de Polignac number, because 64905549 - 2¹⁵ = 64872781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64905549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64905649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203947 + ... + 204264.

It is an arithmetic number, because the mean of its divisors is an integer number (11021724).

Almost surely, 2^64905549 is an apocalyptic number.

It is an amenable number.

64905549 is a deficient number, since it is larger than the sum of its proper divisors (23268243).

64905549 is a wasteful number, since it uses less digits than its factorization.

64905549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408267.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 64905549 is about 8056.3980164835. The cubic root of 64905549 is about 401.8777319306.

The spelling of 64905549 in words is "sixty-four million, nine hundred five thousand, five hundred forty-nine".