2611012860857 has 2 divisors, whose sum is σ = 2611012860858. Its totient is φ = 2611012860856.

The previous prime is 2611012860851. The next prime is 2611012860881. The reversal of 2611012860857 is 7580682101162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1551068485561 + 1059944375296 = 1245419^2 + 1029536^2 .

It is a cyclic number.

It is not a de Polignac number, because 2611012860857 - 2⁶ = 2611012860793 is a prime.

It is not a weakly prime, because it can be changed into another prime (2611012860851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1305506430428 + 1305506430429.

It is an arithmetic number, because the mean of its divisors is an integer number (1305506430429).

Almost surely, 2^{2611012860857} is an apocalyptic number.

It is an amenable number.

2611012860857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2611012860857 is an equidigital number, since it uses as much as digits as its factorization.

2611012860857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 2611012860857 in words is "two trillion, six hundred eleven billion, twelve million, eight hundred sixty thousand, eight hundred fifty-seven".