2605857860867 has 2 divisors, whose sum is σ = 2605857860868. Its totient is φ = 2605857860866.

The previous prime is 2605857860863. The next prime is 2605857860899. The reversal of 2605857860867 is 7680687585062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2605857860867 - 2² = 2605857860863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2605857860797 and 2605857860806.

It is not a weakly prime, because it can be changed into another prime (2605857860863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302928930433 + 1302928930434.

It is an arithmetic number, because the mean of its divisors is an integer number (1302928930434).

Almost surely, 2^{2605857860867} is an apocalyptic number.

2605857860867 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605857860867 is an equidigital number, since it uses as much as digits as its factorization.

2605857860867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270950400, while the sum is 68.

The spelling of 2605857860867 in words is "two trillion, six hundred five billion, eight hundred fifty-seven million, eight hundred sixty thousand, eight hundred sixty-seven".