840520003525 has 12 divisors (see below), whose sum is σ = 1047645042532. Its totient is φ = 668931978240.

The previous prime is 840520003483. The next prime is 840520003529. The reversal of 840520003525 is 525300025048.

It can be written as a sum of positive squares in 6 ways, for example, as 73574935009 + 766945068516 = 271247^2 + 875754^2 .

It is not a de Polignac number, because 840520003525 - 2¹³ = 840519995333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840520003529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87095694 + ... + 87105343.

Almost surely, 2^840520003525 is an apocalyptic number.

It is an amenable number.

840520003525 is a deficient number, since it is larger than the sum of its proper divisors (207125039007).

840520003525 is a wasteful number, since it uses less digits than its factorization.

840520003525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174201240 (or 174201235 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 840520003525 in words is "eight hundred forty billion, five hundred twenty million, three thousand, five hundred twenty-five".