2869768133521 has 9 divisors (see below), whose sum is σ = 2925027848379. Its totient is φ = 2815533474936.

The previous prime is 2869768133483. The next prime is 2869768133543. The reversal of 2869768133521 is 1253318679682.

It is a happy number.

The square root of 2869768133521 is 1694039.

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

It can be written as a sum of positive squares in only one way, i.e., 2068807572225 + 800960561296 = 1438335^2 + 894964^2 .

It is not a de Polignac number, because 2869768133521 - 2²³ = 2869759744913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2869768133521.

It is not an unprimeable number, because it can be changed into a prime (2869768133591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 89768086 + ... + 89800048.

Almost surely, 2^{2869768133521} is an apocalyptic number.

2869768133521 is the 1694039-th square number.

2869768133521 is the 847020-th centered octagonal number.

It is an amenable number.

2869768133521 is a deficient number, since it is larger than the sum of its proper divisors (55259714858).

2869768133521 is an frugal number, since it uses more digits than its factorization.

2869768133521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64032 (or 32016 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 61.

It can be divided in two parts, 2869768 and 133521, that added together give a square (3003289 = 1733²).

The spelling of 2869768133521 in words is "two trillion, eight hundred sixty-nine billion, seven hundred sixty-eight million, one hundred thirty-three thousand, five hundred twenty-one".