16171698553 has 2 divisors, whose sum is σ = 16171698554. Its totient is φ = 16171698552.

The previous prime is 16171698523. The next prime is 16171698661. The reversal of 16171698553 is 35589617161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8966574864 + 7205123689 = 94692^2 + 84883^2 .

It is a cyclic number.

It is not a de Polignac number, because 16171698553 - 2²⁹ = 15634827641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16171698553.

It is not a weakly prime, because it can be changed into another prime (16171698523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8085849276 + 8085849277.

It is an arithmetic number, because the mean of its divisors is an integer number (8085849277).

Almost surely, 2^16171698553 is an apocalyptic number.

It is an amenable number.

16171698553 is a deficient number, since it is larger than the sum of its proper divisors (1).

16171698553 is an equidigital number, since it uses as much as digits as its factorization.

16171698553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 52.

The spelling of 16171698553 in words is "sixteen billion, one hundred seventy-one million, six hundred ninety-eight thousand, five hundred fifty-three".