1144555485921 has 45 divisors (see below), whose sum is σ = 1771190712291. Its totient is φ = 736545637296.

The previous prime is 1144555485889. The next prime is 1144555485959. The reversal of 1144555485921 is 1295845554411.

The square root of 1144555485921 is 1069839.

It is a perfect power (a square), and thus also a powerful number.

1144555485921 is a `hidden beast` number, since 1 + 1 + 4 + 4 + 5 + 5 + 5 + 48 + 592 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 600177133521 + 544378352400 = 774711^2 + 737820^2 .

It is not a de Polignac number, because 1144555485921 - 2⁵ = 1144555485889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1144555480921) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 279225930 + ... + 279230028.

Almost surely, 2^{1144555485921} is an apocalyptic number.

1144555485921 is the 1069839-th square number.

1144555485921 is the 534920-th centered octagonal number.

It is an amenable number.

1144555485921 is a deficient number, since it is larger than the sum of its proper divisors (626635226370).

1144555485921 is an frugal number, since it uses more digits than its factorization.

1144555485921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8268 (or 4131 counting only the distinct ones).

The product of its digits is 5760000, while the sum is 54.

The spelling of 1144555485921 in words is "one trillion, one hundred forty-four billion, five hundred fifty-five million, four hundred eighty-five thousand, nine hundred twenty-one".