242040400445 has 16 divisors (see below), whose sum is σ = 301121498160. Its totient is φ = 186546200064.

The previous prime is 242040400411. The next prime is 242040400447. The reversal of 242040400445 is 544004040242.

It can be written as a sum of positive squares in 8 ways, for example, as 12766062169 + 229274338276 = 112987^2 + 478826^2 .

It is a cyclic number.

It is not a de Polignac number, because 242040400445 - 2²⁴ = 242023623229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242040400447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1760042 + ... + 1892571.

It is an arithmetic number, because the mean of its divisors is an integer number (18820093635).

Almost surely, 2^242040400445 is an apocalyptic number.

It is an amenable number.

242040400445 is a deficient number, since it is larger than the sum of its proper divisors (59081097715).

242040400445 is a wasteful number, since it uses less digits than its factorization.

242040400445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3653104.

The product of its (nonzero) digits is 20480, while the sum is 29.

Adding to 242040400445 its reverse (544004040242), we get a palindrome (786044440687).

The spelling of 242040400445 in words is "two hundred forty-two billion, forty million, four hundred thousand, four hundred forty-five".