6553863661123 has 2 divisors, whose sum is σ = 6553863661124. Its totient is φ = 6553863661122.

The previous prime is 6553863661087. The next prime is 6553863661139. The reversal of 6553863661123 is 3211663683556.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6553863661123 is a prime.

It is a super-2 number, since 2×6553863661123² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6553863641123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3276931830561 + 3276931830562.

It is an arithmetic number, because the mean of its divisors is an integer number (3276931830562).

Almost surely, 2^{6553863661123} is an apocalyptic number.

6553863661123 is a deficient number, since it is larger than the sum of its proper divisors (1).

6553863661123 is an equidigital number, since it uses as much as digits as its factorization.

6553863661123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13996800, while the sum is 55.

The spelling of 6553863661123 in words is "six trillion, five hundred fifty-three billion, eight hundred sixty-three million, six hundred sixty-one thousand, one hundred twenty-three".