144641205557 has 4 divisors (see below), whose sum is σ = 144643957836. Its totient is φ = 144638453280.

The previous prime is 144641205539. The next prime is 144641205593. The reversal of 144641205557 is 755502146441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755502146441 = 7 ⋅107928878063.

It can be written as a sum of positive squares in 2 ways, for example, as 82280627716 + 62360577841 = 286846^2 + 249721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144641205557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144641204557) 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, 1295744 + ... + 1402937.

It is an arithmetic number, because the mean of its divisors is an integer number (36160989459).

Almost surely, 2^144641205557 is an apocalyptic number.

It is an amenable number.

144641205557 is a deficient number, since it is larger than the sum of its proper divisors (2752279).

144641205557 is an equidigital number, since it uses as much as digits as its factorization.

144641205557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752278.

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 144641205557 in words is "one hundred forty-four billion, six hundred forty-one million, two hundred five thousand, five hundred fifty-seven".