18063561457 has 2 divisors, whose sum is σ = 18063561458. Its totient is φ = 18063561456.

The previous prime is 18063561427. The next prime is 18063561469. The reversal of 18063561457 is 75416536081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11445576256 + 6617985201 = 106984^2 + 81351^2 .

It is a cyclic number.

It is not a de Polignac number, because 18063561457 - 2¹⁵ = 18063528689 is a prime.

It is not a weakly prime, because it can be changed into another prime (18063561407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9031780728 + 9031780729.

It is an arithmetic number, because the mean of its divisors is an integer number (9031780729).

Almost surely, 2^18063561457 is an apocalyptic number.

It is an amenable number.

18063561457 is a deficient number, since it is larger than the sum of its proper divisors (1).

18063561457 is an equidigital number, since it uses as much as digits as its factorization.

18063561457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 18063561457 in words is "eighteen billion, sixty-three million, five hundred sixty-one thousand, four hundred fifty-seven".