144638553 has 8 divisors (see below), whose sum is σ = 193966848. Its totient is φ = 95867984.

The previous prime is 144638551. The next prime is 144638563. The reversal of 144638553 is 355836441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144638553 - 2¹ = 144638551 is a prime.

It is a super-2 number, since 2×144638553² = 41840622027867618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144638551) 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, 138825 + ... + 139862.

It is an arithmetic number, because the mean of its divisors is an integer number (24245856).

Almost surely, 2^144638553 is an apocalyptic number.

It is an amenable number.

144638553 is a deficient number, since it is larger than the sum of its proper divisors (49328295).

144638553 is a wasteful number, since it uses less digits than its factorization.

144638553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278863.

The product of its digits is 172800, while the sum is 39.

The square root of 144638553 is about 12026.5769444177. The cubic root of 144638553 is about 524.9218967713.

The spelling of 144638553 in words is "one hundred forty-four million, six hundred thirty-eight thousand, five hundred fifty-three".