13551366551 has 2 divisors, whose sum is σ = 13551366552. Its totient is φ = 13551366550.

The previous prime is 13551366503. The next prime is 13551366643. The reversal of 13551366551 is 15566315531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13551366551 - 2¹⁸ = 13551104407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13551366499 and 13551366508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13551360551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6775683275 + 6775683276.

It is an arithmetic number, because the mean of its divisors is an integer number (6775683276).

Almost surely, 2^13551366551 is an apocalyptic number.

13551366551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13551366551 is an equidigital number, since it uses as much as digits as its factorization.

13551366551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 202500, while the sum is 41.

The spelling of 13551366551 in words is "thirteen billion, five hundred fifty-one million, three hundred sixty-six thousand, five hundred fifty-one".