15455784497 has 2 divisors, whose sum is σ = 15455784498. Its totient is φ = 15455784496.

The previous prime is 15455784451. The next prime is 15455784527. The reversal of 15455784497 is 79448755451.

It is a happy number.

15455784497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13079124496 + 2376660001 = 114364^2 + 48751^2 .

It is a cyclic number.

It is not a de Polignac number, because 15455784497 - 2⁸ = 15455784241 is a prime.

It is not a weakly prime, because it can be changed into another prime (15455784427) 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, 7727892248 + 7727892249.

It is an arithmetic number, because the mean of its divisors is an integer number (7727892249).

Almost surely, 2^15455784497 is an apocalyptic number.

It is an amenable number.

15455784497 is a deficient number, since it is larger than the sum of its proper divisors (1).

15455784497 is an equidigital number, since it uses as much as digits as its factorization.

15455784497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224000, while the sum is 59.

The spelling of 15455784497 in words is "fifteen billion, four hundred fifty-five million, seven hundred eighty-four thousand, four hundred ninety-seven".