11861902861873 has 2 divisors, whose sum is σ = 11861902861874. Its totient is φ = 11861902861872.

The previous prime is 11861902861859. The next prime is 11861902861961. The reversal of 11861902861873 is 37816820916811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11323716295329 + 538186566544 = 3365073^2 + 733612^2 .

It is a cyclic number.

It is not a de Polignac number, because 11861902861873 - 2²⁵ = 11861869307441 is a prime.

It is not a weakly prime, because it can be changed into another prime (11861902861673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5930951430936 + 5930951430937.

It is an arithmetic number, because the mean of its divisors is an integer number (5930951430937).

Almost surely, 2^{11861902861873} is an apocalyptic number.

It is an amenable number.

11861902861873 is a deficient number, since it is larger than the sum of its proper divisors (1).

11861902861873 is an equidigital number, since it uses as much as digits as its factorization.

11861902861873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 61.

The spelling of 11861902861873 in words is "eleven trillion, eight hundred sixty-one billion, nine hundred two million, eight hundred sixty-one thousand, eight hundred seventy-three".