64648433 has 6 divisors (see below), whose sum is σ = 68675286. Its totient is φ = 60845312.

The previous prime is 64648429. The next prime is 64648439. The reversal of 64648433 is 33484646.

It can be written as a sum of positive squares in 3 ways, for example, as 26801329 + 37847104 = 5177^2 + 6152^2 .

It is not a de Polignac number, because 64648433 - 2² = 64648429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64648439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111560 + ... + 112137.

It is an arithmetic number, because the mean of its divisors is an integer number (11445881).

Almost surely, 2^64648433 is an apocalyptic number.

It is an amenable number.

64648433 is a deficient number, since it is larger than the sum of its proper divisors (4026853).

64648433 is a wasteful number, since it uses less digits than its factorization.

64648433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223731 (or 223714 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The square root of 64648433 is about 8040.4249265819. The cubic root of 64648433 is about 401.3463652504.

The spelling of 64648433 in words is "sixty-four million, six hundred forty-eight thousand, four hundred thirty-three".