64613144 has 8 divisors (see below), whose sum is σ = 121149660. Its totient is φ = 32306568.

The previous prime is 64613123. The next prime is 64613147. The reversal of 64613144 is 44131646.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64613147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4038314 + ... + 4038329.

Almost surely, 2^64613144 is an apocalyptic number.

It is an amenable number.

64613144 is a deficient number, since it is larger than the sum of its proper divisors (56536516).

64613144 is a wasteful number, since it uses less digits than its factorization.

64613144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8076649 (or 8076645 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 64613144 is about 8038.2301534604. The cubic root of 64613144 is about 401.2733256368.

The spelling of 64613144 in words is "sixty-four million, six hundred thirteen thousand, one hundred forty-four".