2521869289787 has 2 divisors, whose sum is σ = 2521869289788. Its totient is φ = 2521869289786.

The previous prime is 2521869289717. The next prime is 2521869289789. The reversal of 2521869289787 is 7879829681252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2521869289787 - 2²⁶ = 2521802180923 is a prime.

Together with 2521869289789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2521869289789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260934644893 + 1260934644894.

It is an arithmetic number, because the mean of its divisors is an integer number (1260934644894).

Almost surely, 2^{2521869289787} is an apocalyptic number.

2521869289787 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521869289787 is an equidigital number, since it uses as much as digits as its factorization.

2521869289787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 487710720, while the sum is 74.

The spelling of 2521869289787 in words is "two trillion, five hundred twenty-one billion, eight hundred sixty-nine million, two hundred eighty-nine thousand, seven hundred eighty-seven".