64133144 has 8 divisors (see below), whose sum is σ = 120249660. Its totient is φ = 32066568.

The previous prime is 64133119. The next prime is 64133149. The reversal of 64133144 is 44133146.

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

It is a super-2 number, since 2×64133144² = 8226120318649472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64133149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4008314 + ... + 4008329.

Almost surely, 2^64133144 is an apocalyptic number.

It is an amenable number.

64133144 is a deficient number, since it is larger than the sum of its proper divisors (56116516).

64133144 is a wasteful number, since it uses less digits than its factorization.

64133144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8016649 (or 8016645 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 64133144 is about 8008.3171765359. The cubic root of 64133144 is about 400.2771912016.

The spelling of 64133144 in words is "sixty-four million, one hundred thirty-three thousand, one hundred forty-four".