2869503869521 has 27 divisors (see below), whose sum is σ = 2950665698043. Its totient is φ = 2790563592960.

The previous prime is 2869503869513. The next prime is 2869503869527. The reversal of 2869503869521 is 1259683059682.

The square root of 2869503869521 is 1693961.

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., 695247454225 + 2174256415296 = 833815^2 + 1474536^2 .

It is not a de Polignac number, because 2869503869521 - 2³ = 2869503869513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2869503869527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14867895601 + ... + 14867895793.

Almost surely, 2^{2869503869521} is an apocalyptic number.

2869503869521 is the 1693961-st square number.

2869503869521 is the 846981-st centered octagonal number.

It is an amenable number.

2869503869521 is a deficient number, since it is larger than the sum of its proper divisors (81161828522).

2869503869521 is an frugal number, since it uses more digits than its factorization.

2869503869521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 64.

Multiplying 2869503869521 by its sum of digits (64), we get a square (183648247649344 = 13551688²).

The spelling of 2869503869521 in words is "two trillion, eight hundred sixty-nine billion, five hundred three million, eight hundred sixty-nine thousand, five hundred twenty-one".