64685049 has 32 divisors (see below), whose sum is σ = 102187008. Its totient is φ = 35880000.

The previous prime is 64685041. The next prime is 64685053. The reversal of 64685049 is 94058646.

It is not a de Polignac number, because 64685049 - 2³ = 64685041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64685049.

It is not an unprimeable number, because it can be changed into a prime (64685041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55624 + ... + 56774.

It is an arithmetic number, because the mean of its divisors is an integer number (3193344).

Almost surely, 2^64685049 is an apocalyptic number.

It is an amenable number.

64685049 is a deficient number, since it is larger than the sum of its proper divisors (37501959).

64685049 is a wasteful number, since it uses less digits than its factorization.

64685049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 64685049 is about 8042.7015983437. The cubic root of 64685049 is about 401.4221233377.

The spelling of 64685049 in words is "sixty-four million, six hundred eighty-five thousand, forty-nine".