15545455399 has 2 divisors, whose sum is σ = 15545455400. Its totient is φ = 15545455398.

The previous prime is 15545455351. The next prime is 15545455403. The reversal of 15545455399 is 99355454551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15545455399 - 2⁹ = 15545454887 is a prime.

It is a super-2 number, since 2×15545455399² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15545455309) 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, 7772727699 + 7772727700.

It is an arithmetic number, because the mean of its divisors is an integer number (7772727700).

Almost surely, 2^15545455399 is an apocalyptic number.

15545455399 is a deficient number, since it is larger than the sum of its proper divisors (1).

15545455399 is an equidigital number, since it uses as much as digits as its factorization.

15545455399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150000, while the sum is 55.

The spelling of 15545455399 in words is "fifteen billion, five hundred forty-five million, four hundred fifty-five thousand, three hundred ninety-nine".