15456661663 has 2 divisors, whose sum is σ = 15456661664. Its totient is φ = 15456661662.

The previous prime is 15456661603. The next prime is 15456661667. The reversal of 15456661663 is 36616665451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15456661663 - 2³³ = 6866727071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15456661667) 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, 7728330831 + 7728330832.

It is an arithmetic number, because the mean of its divisors is an integer number (7728330832).

Almost surely, 2^15456661663 is an apocalyptic number.

15456661663 is a deficient number, since it is larger than the sum of its proper divisors (1).

15456661663 is an equidigital number, since it uses as much as digits as its factorization.

15456661663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 49.

The spelling of 15456661663 in words is "fifteen billion, four hundred fifty-six million, six hundred sixty-one thousand, six hundred sixty-three".