64535144 has 16 divisors (see below), whose sum is σ = 123055200. Its totient is φ = 31720432.

The previous prime is 64535113. The next prime is 64535161. The reversal of 64535144 is 44153546.

It is a super-2 number, since 2×64535144² = 8329569622201472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64535144.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67892 + ... + 68835.

It is an arithmetic number, because the mean of its divisors is an integer number (7690950).

Almost surely, 2^64535144 is an apocalyptic number.

It is an amenable number.

64535144 is a deficient number, since it is larger than the sum of its proper divisors (58520056).

64535144 is a wasteful number, since it uses less digits than its factorization.

64535144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136792 (or 136788 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 64535144 is about 8033.3768740176. The cubic root of 64535144 is about 401.1117902762. Note that the first 3 decimals are identical.

The spelling of 64535144 in words is "sixty-four million, five hundred thirty-five thousand, one hundred forty-four".