11543871851 has 2 divisors, whose sum is σ = 11543871852. Its totient is φ = 11543871850.

The previous prime is 11543871839. The next prime is 11543871877. The reversal of 11543871851 is 15817834511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11543871851 - 2²² = 11539677547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11543871881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771935925 + 5771935926.

It is an arithmetic number, because the mean of its divisors is an integer number (5771935926).

Almost surely, 2^11543871851 is an apocalyptic number.

11543871851 is a deficient number, since it is larger than the sum of its proper divisors (1).

11543871851 is an equidigital number, since it uses as much as digits as its factorization.

11543871851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 44.

The spelling of 11543871851 in words is "eleven billion, five hundred forty-three million, eight hundred seventy-one thousand, eight hundred fifty-one".