16898935661 has 2 divisors, whose sum is σ = 16898935662. Its totient is φ = 16898935660.

The previous prime is 16898935649. The next prime is 16898935723. The reversal of 16898935661 is 16653989861.

It is an a-pointer prime, because the next prime (16898935723) can be obtained adding 16898935661 to its sum of digits (62).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16146530761 + 752404900 = 127069^2 + 27430^2 .

It is an emirp because it is prime and its reverse (16653989861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16898935661 - 2²⁶ = 16831826797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16898935594 and 16898935603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16898935621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8449467830 + 8449467831.

It is an arithmetic number, because the mean of its divisors is an integer number (8449467831).

Almost surely, 2^16898935661 is an apocalyptic number.

It is an amenable number.

16898935661 is a deficient number, since it is larger than the sum of its proper divisors (1).

16898935661 is an equidigital number, since it uses as much as digits as its factorization.

16898935661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160, while the sum is 62.

The spelling of 16898935661 in words is "sixteen billion, eight hundred ninety-eight million, nine hundred thirty-five thousand, six hundred sixty-one".