11851488491 has 2 divisors, whose sum is σ = 11851488492. Its totient is φ = 11851488490.

The previous prime is 11851488401. The next prime is 11851488503. The reversal of 11851488491 is 19488415811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11851488491 - 2¹⁰ = 11851487467 is a prime.

It is not a weakly prime, because it can be changed into another prime (11851488401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5925744245 + 5925744246.

It is an arithmetic number, because the mean of its divisors is an integer number (5925744246).

Almost surely, 2^11851488491 is an apocalyptic number.

11851488491 is a deficient number, since it is larger than the sum of its proper divisors (1).

11851488491 is an equidigital number, since it uses as much as digits as its factorization.

11851488491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368640, while the sum is 50.

The spelling of 11851488491 in words is "eleven billion, eight hundred fifty-one million, four hundred eighty-eight thousand, four hundred ninety-one".