1880856111817 has 2 divisors, whose sum is σ = 1880856111818. Its totient is φ = 1880856111816.

The previous prime is 1880856111793. The next prime is 1880856111829. The reversal of 1880856111817 is 7181116580881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1854033533641 + 26822578176 = 1361629^2 + 163776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1880856111817 - 2³¹ = 1878708628169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1880856111877) 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, 940428055908 + 940428055909.

It is an arithmetic number, because the mean of its divisors is an integer number (940428055909).

Almost surely, 2^{1880856111817} is an apocalyptic number.

It is an amenable number.

1880856111817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1880856111817 is an equidigital number, since it uses as much as digits as its factorization.

1880856111817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 860160, while the sum is 55.

The spelling of 1880856111817 in words is "one trillion, eight hundred eighty billion, eight hundred fifty-six million, one hundred eleven thousand, eight hundred seventeen".