64055144 has 8 divisors (see below), whose sum is σ = 120103410. Its totient is φ = 32027568.

The previous prime is 64055129. The next prime is 64055191. The reversal of 64055144 is 44155046.

It can be written as a sum of positive squares in only one way, i.e., 49140100 + 14915044 = 7010^2 + 3862^2 .

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

It is a super-2 number, since 2×64055144² = 8206122945721472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4003439 + ... + 4003454.

Almost surely, 2^64055144 is an apocalyptic number.

It is an amenable number.

64055144 is a deficient number, since it is larger than the sum of its proper divisors (56048266).

64055144 is a wasteful number, since it uses less digits than its factorization.

64055144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8006899 (or 8006895 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 64055144 is about 8003.4457579220. The cubic root of 64055144 is about 400.1148503537.

The spelling of 64055144 in words is "sixty-four million, fifty-five thousand, one hundred forty-four".