1551554553163 has 2 divisors, whose sum is σ = 1551554553164. Its totient is φ = 1551554553162.

The previous prime is 1551554553091. The next prime is 1551554553193. The reversal of 1551554553163 is 3613554551551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1551554553163 - 2³³ = 1542964618571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551554553193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775777276581 + 775777276582.

It is an arithmetic number, because the mean of its divisors is an integer number (775777276582).

Almost surely, 2^{1551554553163} is an apocalyptic number.

1551554553163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551554553163 is an equidigital number, since it uses as much as digits as its factorization.

1551554553163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3375000, while the sum is 49.

The spelling of 1551554553163 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-four million, five hundred fifty-three thousand, one hundred sixty-three".