24494281991 has 2 divisors, whose sum is σ = 24494281992. Its totient is φ = 24494281990.

The previous prime is 24494281979. The next prime is 24494281997. The reversal of 24494281991 is 19918249442.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24494281991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24494281997) 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, 12247140995 + 12247140996.

It is an arithmetic number, because the mean of its divisors is an integer number (12247140996).

Almost surely, 2^24494281991 is an apocalyptic number.

24494281991 is a deficient number, since it is larger than the sum of its proper divisors (1).

24494281991 is an equidigital number, since it uses as much as digits as its factorization.

24494281991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 53.

The spelling of 24494281991 in words is "twenty-four billion, four hundred ninety-four million, two hundred eighty-one thousand, nine hundred ninety-one".