15494481491 has 2 divisors, whose sum is σ = 15494481492. Its totient is φ = 15494481490.

The previous prime is 15494481487. The next prime is 15494481511. The reversal of 15494481491 is 19418449451.

15494481491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (19418449451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15494481491 - 2² = 15494481487 is a prime.

It is not a weakly prime, because it can be changed into another prime (15494481481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7747240745 + 7747240746.

It is an arithmetic number, because the mean of its divisors is an integer number (7747240746).

Almost surely, 2^15494481491 is an apocalyptic number.

15494481491 is a deficient number, since it is larger than the sum of its proper divisors (1).

15494481491 is an equidigital number, since it uses as much as digits as its factorization.

15494481491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 50.

The spelling of 15494481491 in words is "fifteen billion, four hundred ninety-four million, four hundred eighty-one thousand, four hundred ninety-one".