144529557661 has 4 divisors (see below), whose sum is σ = 144570539232. Its totient is φ = 144488576092.

The previous prime is 144529557631. The next prime is 144529557691. The reversal of 144529557661 is 166755925441.

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 an interprime number because it is at equal distance from previous prime (144529557631) and next prime (144529557691).

It is a cyclic number.

It is not a de Polignac number, because 144529557661 - 2⁷ = 144529557533 is a prime.

It is a super-3 number, since 3×144529557661³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144529557631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20485495 + ... + 20492548.

It is an arithmetic number, because the mean of its divisors is an integer number (36142634808).

Almost surely, 2^144529557661 is an apocalyptic number.

It is an amenable number.

144529557661 is a deficient number, since it is larger than the sum of its proper divisors (40981571).

144529557661 is an equidigital number, since it uses as much as digits as its factorization.

144529557661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40981570.

The product of its digits is 9072000, while the sum is 55.

The spelling of 144529557661 in words is "one hundred forty-four billion, five hundred twenty-nine million, five hundred fifty-seven thousand, six hundred sixty-one".