6256631878009 has 2 divisors, whose sum is σ = 6256631878010. Its totient is φ = 6256631878008.

The previous prime is 6256631877911. The next prime is 6256631878061. The reversal of 6256631878009 is 9008781366526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5832935031609 + 423696846400 = 2415147^2 + 650920^2 .

It is a cyclic number.

It is not a de Polignac number, because 6256631878009 - 2⁹ = 6256631877497 is a prime.

It is not a weakly prime, because it can be changed into another prime (6256631878109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3128315939004 + 3128315939005.

It is an arithmetic number, because the mean of its divisors is an integer number (3128315939005).

Almost surely, 2^{6256631878009} is an apocalyptic number.

It is an amenable number.

6256631878009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6256631878009 is an equidigital number, since it uses as much as digits as its factorization.

6256631878009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 6256631878009 in words is "six trillion, two hundred fifty-six billion, six hundred thirty-one million, eight hundred seventy-eight thousand, nine".