64936449 has 12 divisors (see below), whose sum is σ = 93870036. Its totient is φ = 43257312.

The previous prime is 64936439. The next prime is 64936463. The reversal of 64936449 is 94463946.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 64400625 = 732^2 + 8025^2 .

It is not a de Polignac number, because 64936449 - 2²⁴ = 48159233 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64936409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16167 + ... + 19779.

It is an arithmetic number, because the mean of its divisors is an integer number (7822503).

Almost surely, 2^64936449 is an apocalyptic number.

It is an amenable number.

64936449 is a deficient number, since it is larger than the sum of its proper divisors (28933587).

64936449 is a wasteful number, since it uses less digits than its factorization.

64936449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616 (or 5613 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 64936449 is about 8058.3155187669. The cubic root of 64936449 is about 401.9414966471.

The spelling of 64936449 in words is "sixty-four million, nine hundred thirty-six thousand, four hundred forty-nine".