2144205121545 has 12 divisors (see below), whose sum is σ = 3716622210756. Its totient is φ = 1143576064800.

The previous prime is 2144205121543. The next prime is 2144205121621. The reversal of 2144205121545 is 5451215024412.

2144205121545 is a `hidden beast` number, since 2 + 1 + 4 + 42 + 0 + 51 + 21 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 273634656201 + 1870570465344 = 523101^2 + 1367688^2 .

It is not a de Polignac number, because 2144205121545 - 2¹ = 2144205121543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2144205121543) 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, 23824501306 + ... + 23824501395.

It is an arithmetic number, because the mean of its divisors is an integer number (309718517563).

Almost surely, 2^{2144205121545} is an apocalyptic number.

It is an amenable number.

2144205121545 is a deficient number, since it is larger than the sum of its proper divisors (1572417089211).

2144205121545 is a wasteful number, since it uses less digits than its factorization.

2144205121545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47649002712 (or 47649002709 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

The spelling of 2144205121545 in words is "two trillion, one hundred forty-four billion, two hundred five million, one hundred twenty-one thousand, five hundred forty-five".