1886866855387 has 2 divisors, whose sum is σ = 1886866855388. Its totient is φ = 1886866855386.

The previous prime is 1886866855373. The next prime is 1886866855411. The reversal of 1886866855387 is 7835586686881.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1886866855387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1886866855187) 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, 943433427693 + 943433427694.

It is an arithmetic number, because the mean of its divisors is an integer number (943433427694).

Almost surely, 2^{1886866855387} is an apocalyptic number.

1886866855387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1886866855387 is an equidigital number, since it uses as much as digits as its factorization.

1886866855387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3715891200, while the sum is 79.

The spelling of 1886866855387 in words is "one trillion, eight hundred eighty-six billion, eight hundred sixty-six million, eight hundred fifty-five thousand, three hundred eighty-seven".