8538563198551 has 2 divisors, whose sum is σ = 8538563198552. Its totient is φ = 8538563198550.

The previous prime is 8538563198507. The next prime is 8538563198573. The reversal of 8538563198551 is 1558913658358.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8538563198551 - 2¹¹ = 8538563196503 is a prime.

It is a super-2 number, since 2×8538563198551² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8538563198591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4269281599275 + 4269281599276.

It is an arithmetic number, because the mean of its divisors is an integer number (4269281599276).

Almost surely, 2^{8538563198551} is an apocalyptic number.

8538563198551 is a deficient number, since it is larger than the sum of its proper divisors (1).

8538563198551 is an equidigital number, since it uses as much as digits as its factorization.

8538563198551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520000, while the sum is 67.

The spelling of 8538563198551 in words is "eight trillion, five hundred thirty-eight billion, five hundred sixty-three million, one hundred ninety-eight thousand, five hundred fifty-one".