2521869289717 has 2 divisors, whose sum is σ = 2521869289718. Its totient is φ = 2521869289716.

The previous prime is 2521869289703. The next prime is 2521869289787. The reversal of 2521869289717 is 7179829681252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1734486366001 + 787382923716 = 1316999^2 + 887346^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521869289717 - 2¹¹ = 2521869287669 is a prime.

It is a super-3 number, since 3×2521869289717³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521869289787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260934644858 + 1260934644859.

It is an arithmetic number, because the mean of its divisors is an integer number (1260934644859).

Almost surely, 2^{2521869289717} is an apocalyptic number.

It is an amenable number.

2521869289717 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521869289717 is an equidigital number, since it uses as much as digits as its factorization.

2521869289717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60963840, while the sum is 67.

The spelling of 2521869289717 in words is "two trillion, five hundred twenty-one billion, eight hundred sixty-nine million, two hundred eighty-nine thousand, seven hundred seventeen".