1867165872851 has 2 divisors, whose sum is σ = 1867165872852. Its totient is φ = 1867165872850.

The previous prime is 1867165872827. The next prime is 1867165872853. The reversal of 1867165872851 is 1582785617681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1867165872851 - 2⁶ = 1867165872787 is a prime.

It is a super-3 number, since 3×1867165872851³ (a number of 38 digits) contains 333 as substring.

Together with 1867165872853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1867165872853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933582936425 + 933582936426.

It is an arithmetic number, because the mean of its divisors is an integer number (933582936426).

Almost surely, 2^{1867165872851} is an apocalyptic number.

1867165872851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1867165872851 is an equidigital number, since it uses as much as digits as its factorization.

1867165872851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45158400, while the sum is 65.

The spelling of 1867165872851 in words is "one trillion, eight hundred sixty-seven billion, one hundred sixty-five million, eight hundred seventy-two thousand, eight hundred fifty-one".