144641161521 has 12 divisors (see below), whose sum is σ = 209121576820. Its totient is φ = 96337231200.

The previous prime is 144641161397. The next prime is 144641161681. The reversal of 144641161521 is 125161146441.

144641161521 is a `hidden beast` number, since 1 + 4 + 4 + 6 + 4 + 11 + 615 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 79248443121 + 65392718400 = 281511^2 + 255720^2 .

It is not a de Polignac number, because 144641161521 - 2¹¹ = 144641159473 is a prime.

It is a super-2 number, since 2×144641161521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144641161121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7507330 + ... + 7526571.

Almost surely, 2^144641161521 is an apocalyptic number.

It is an amenable number.

144641161521 is a deficient number, since it is larger than the sum of its proper divisors (64480415299).

144641161521 is a wasteful number, since it uses less digits than its factorization.

144641161521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15034976 (or 15034973 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The spelling of 144641161521 in words is "one hundred forty-four billion, six hundred forty-one million, one hundred sixty-one thousand, five hundred twenty-one".