3520120206725 has 6 divisors (see below), whose sum is σ = 4364949056370. Its totient is φ = 2816096165360.

The previous prime is 3520120206689. The next prime is 3520120206737. The reversal of 3520120206725 is 5276020210253.

It can be written as a sum of positive squares in 3 ways, for example, as 828505909729 + 2691614296996 = 910223^2 + 1640614^2 .

It is not a de Polignac number, because 3520120206725 - 2¹⁴ = 3520120190341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70402404110 + ... + 70402404159.

It is an arithmetic number, because the mean of its divisors is an integer number (727491509395).

Almost surely, 2^{3520120206725} is an apocalyptic number.

It is an amenable number.

3520120206725 is a deficient number, since it is larger than the sum of its proper divisors (844828849645).

3520120206725 is a wasteful number, since it uses less digits than its factorization.

3520120206725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140804808279 (or 140804808274 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

Adding to 3520120206725 its reverse (5276020210253), we get a palindrome (8796140416978).

The spelling of 3520120206725 in words is "three trillion, five hundred twenty billion, one hundred twenty million, two hundred six thousand, seven hundred twenty-five".