144640653 has 4 divisors (see below), whose sum is σ = 192854208. Its totient is φ = 96427100.

The previous prime is 144640633. The next prime is 144640663. The reversal of 144640653 is 356046441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144640653 - 2⁵ = 144640621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144640633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24106773 + ... + 24106778.

It is an arithmetic number, because the mean of its divisors is an integer number (48213552).

Almost surely, 2^144640653 is an apocalyptic number.

It is an amenable number.

144640653 is a deficient number, since it is larger than the sum of its proper divisors (48213555).

144640653 is an equidigital number, since it uses as much as digits as its factorization.

144640653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48213554.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 144640653 is about 12026.6642507389. The cubic root of 144640653 is about 524.9244371974.

The spelling of 144640653 in words is "one hundred forty-four million, six hundred forty thousand, six hundred fifty-three".