842144995565 has 16 divisors (see below), whose sum is σ = 1040142593280. Its totient is φ = 654283206720.

The previous prime is 842144995553. The next prime is 842144995583. The reversal of 842144995565 is 565599441248.

It is not a de Polignac number, because 842144995565 - 2¹² = 842144991469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 842144995498 and 842144995507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17451419 + ... + 17499608.

It is an arithmetic number, because the mean of its divisors is an integer number (65008912080).

Almost surely, 2^842144995565 is an apocalyptic number.

It is an amenable number.

842144995565 is a deficient number, since it is larger than the sum of its proper divisors (197997597715).

842144995565 is a wasteful number, since it uses less digits than its factorization.

842144995565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34951172.

The product of its digits is 62208000, while the sum is 62.

The spelling of 842144995565 in words is "eight hundred forty-two billion, one hundred forty-four million, nine hundred ninety-five thousand, five hundred sixty-five".