64404616 has 8 divisors (see below), whose sum is σ = 120758670. Its totient is φ = 32202304.

The previous prime is 64404611. The next prime is 64404649. The reversal of 64404616 is 61640446.

It can be written as a sum of positive squares in only one way, i.e., 46376100 + 18028516 = 6810^2 + 4246^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (64404611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4025281 + ... + 4025296.

Almost surely, 2^64404616 is an apocalyptic number.

It is an amenable number.

64404616 is a deficient number, since it is larger than the sum of its proper divisors (56354054).

64404616 is a wasteful number, since it uses less digits than its factorization.

64404616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050583 (or 8050579 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 64404616 is about 8025.2486565838. The cubic root of 64404616 is about 400.8411798013.

The spelling of 64404616 in words is "sixty-four million, four hundred four thousand, six hundred sixteen".