2605857860819 has 2 divisors, whose sum is σ = 2605857860820. Its totient is φ = 2605857860818.

The previous prime is 2605857860731. The next prime is 2605857860863. The reversal of 2605857860819 is 9180687585062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2605857860819 - 2⁸ = 2605857860563 is a prime.

It is a super-2 number, since 2×2605857860819² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2605857860899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302928930409 + 1302928930410.

It is an arithmetic number, because the mean of its divisors is an integer number (1302928930410).

Almost surely, 2^{2605857860819} is an apocalyptic number.

2605857860819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605857860819 is an equidigital number, since it uses as much as digits as its factorization.

2605857860819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58060800, while the sum is 65.

The spelling of 2605857860819 in words is "two trillion, six hundred five billion, eight hundred fifty-seven million, eight hundred sixty thousand, eight hundred nineteen".