6281878125625 has 20 divisors (see below), whose sum is σ = 7927556123124. Its totient is φ = 4975745000000.

The previous prime is 6281878125571. The next prime is 6281878125661. The reversal of 6281878125625 is 5265218781826.

It can be written as a sum of positive squares in 10 ways, for example, as 961695996921 + 5320182128704 = 980661^2 + 2306552^2 .

It is not a de Polignac number, because 6281878125625 - 2⁹ = 6281878125113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49694326 + ... + 49820575.

Almost surely, 2^{6281878125625} is an apocalyptic number.

It is an amenable number.

6281878125625 is a deficient number, since it is larger than the sum of its proper divisors (1645677997499).

6281878125625 is an equidigital number, since it uses as much as digits as its factorization.

6281878125625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99515022 (or 99515007 counting only the distinct ones).

The product of its digits is 25804800, while the sum is 61.

The spelling of 6281878125625 in words is "six trillion, two hundred eighty-one billion, eight hundred seventy-eight million, one hundred twenty-five thousand, six hundred twenty-five".