24871994491 has 2 divisors, whose sum is σ = 24871994492. Its totient is φ = 24871994490.

The previous prime is 24871994489. The next prime is 24871994509. The reversal of 24871994491 is 19449917842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 24871994491 - 2¹ = 24871994489 is a prime.

It is a super-2 number, since 2×24871994491² (a number of 22 digits) contains 22 as substring.

Together with 24871994489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (24871994591) 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, 12435997245 + 12435997246.

It is an arithmetic number, because the mean of its divisors is an integer number (12435997246).

Almost surely, 2^24871994491 is an apocalyptic number.

24871994491 is a deficient number, since it is larger than the sum of its proper divisors (1).

24871994491 is an equidigital number, since it uses as much as digits as its factorization.

24871994491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 58.

The spelling of 24871994491 in words is "twenty-four billion, eight hundred seventy-one million, nine hundred ninety-four thousand, four hundred ninety-one".