64573136 has 20 divisors (see below), whose sum is σ = 127163364. Its totient is φ = 31756800.

The previous prime is 64573129. The next prime is 64573139. The reversal of 64573136 is 63137546.

It can be written as a sum of positive squares in 2 ways, for example, as 31854736 + 32718400 = 5644^2 + 5720^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64573096 and 64573105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64573139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32105 + ... + 34056.

Almost surely, 2^64573136 is an apocalyptic number.

It is an amenable number.

64573136 is a deficient number, since it is larger than the sum of its proper divisors (62590228).

64573136 is a wasteful number, since it uses less digits than its factorization.

64573136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66230 (or 66224 counting only the distinct ones).

The product of its digits is 45360, while the sum is 35.

The square root of 64573136 is about 8035.7411605900. The cubic root of 64573136 is about 401.1904866720.

The spelling of 64573136 in words is "sixty-four million, five hundred seventy-three thousand, one hundred thirty-six".