64505949 has 16 divisors (see below), whose sum is σ = 88965120. Its totient is φ = 41549040.

The previous prime is 64505927. The next prime is 64505951. The reversal of 64505949 is 94950546.

It is a happy number.

64505949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64505949 - 2¹³ = 64497757 is a prime.

It is a super-2 number, since 2×64505949² = 8322034912781202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64505949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64505989) 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 15 ways as a sum of consecutive naturals, for example, 8244 + ... + 14034.

It is an arithmetic number, because the mean of its divisors is an integer number (5560320).

Almost surely, 2^64505949 is an apocalyptic number.

It is an amenable number.

64505949 is a deficient number, since it is larger than the sum of its proper divisors (24459171).

64505949 is a wasteful number, since it uses less digits than its factorization.

64505949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5920.

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

The square root of 64505949 is about 8031.5595621274. The cubic root of 64505949 is about 401.0512949434.

The spelling of 64505949 in words is "sixty-four million, five hundred five thousand, nine hundred forty-nine".