15456661603 has 2 divisors, whose sum is σ = 15456661604. Its totient is φ = 15456661602.

The previous prime is 15456661531. The next prime is 15456661663. The reversal of 15456661603 is 30616665451.

15456661603 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15456661603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15456661603.

It is not a weakly prime, because it can be changed into another prime (15456661663) 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, 7728330801 + 7728330802.

It is an arithmetic number, because the mean of its divisors is an integer number (7728330802).

Almost surely, 2^15456661603 is an apocalyptic number.

15456661603 is a deficient number, since it is larger than the sum of its proper divisors (1).

15456661603 is an equidigital number, since it uses as much as digits as its factorization.

15456661603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 15456661603 in words is "fifteen billion, four hundred fifty-six million, six hundred sixty-one thousand, six hundred three".