64355144 has 32 divisors (see below), whose sum is σ = 140512320. Its totient is φ = 27059136.

The previous prime is 64355131. The next prime is 64355153. The reversal of 64355144 is 44155346.

It is a self number, because there is not a number n which added to its sum of digits gives 64355144.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7874 + ... + 13809.

It is an arithmetic number, because the mean of its divisors is an integer number (4391010).

Almost surely, 2^64355144 is an apocalyptic number.

It is an amenable number.

64355144 is an abundant number, since it is smaller than the sum of its proper divisors (76157176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64355144 is a wasteful number, since it uses less digits than its factorization.

64355144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21749 (or 21745 counting only the distinct ones).

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

The square root of 64355144 is about 8022.1657923531. The cubic root of 64355144 is about 400.7385189685.

The spelling of 64355144 in words is "sixty-four million, three hundred fifty-five thousand, one hundred forty-four".