13821141565 has 64 divisors (see below), whose sum is σ = 21145079808. Its totient is φ = 8423078400.

The previous prime is 13821141541. The next prime is 13821141599. The reversal of 13821141565 is 56514112831.

It is not a de Polignac number, because 13821141565 - 2¹³ = 13821133373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3531960 + ... + 3535870.

It is an arithmetic number, because the mean of its divisors is an integer number (330391872).

Almost surely, 2^13821141565 is an apocalyptic number.

It is an amenable number.

13821141565 is a deficient number, since it is larger than the sum of its proper divisors (7323938243).

13821141565 is a wasteful number, since it uses less digits than its factorization.

13821141565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138.

The product of its digits is 28800, while the sum is 37.

It can be divided in two parts, 138211 and 41565, that added together give a square (179776 = 424²).

The spelling of 13821141565 in words is "thirteen billion, eight hundred twenty-one million, one hundred forty-one thousand, five hundred sixty-five".