664153144 has 32 divisors (see below), whose sum is σ = 1325423520. Its totient is φ = 310910976.

The previous prime is 664153141. The next prime is 664153159. The reversal of 664153144 is 441351466.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664153141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13597 + ... + 38899.

It is an arithmetic number, because the mean of its divisors is an integer number (41419485).

Almost surely, 2^664153144 is an apocalyptic number.

It is an amenable number.

664153144 is a deficient number, since it is larger than the sum of its proper divisors (661270376).

664153144 is a wasteful number, since it uses less digits than its factorization.

664153144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25519 (or 25515 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 664153144 is about 25771.1688520331. The cubic root of 664153144 is about 872.4811999135.

The spelling of 664153144 in words is "six hundred sixty-four million, one hundred fifty-three thousand, one hundred forty-four".