16553998969 has 2 divisors, whose sum is σ = 16553998970. Its totient is φ = 16553998968.

The previous prime is 16553998963. The next prime is 16553998973. The reversal of 16553998969 is 96989935561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16501971600 + 52027369 = 128460^2 + 7213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16553998969 is a prime.

It is a super-2 number, since 2×16553998969² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16553998898 and 16553998907.

It is not a weakly prime, because it can be changed into another prime (16553998963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8276999484 + 8276999485.

It is an arithmetic number, because the mean of its divisors is an integer number (8276999485).

Almost surely, 2^16553998969 is an apocalyptic number.

It is an amenable number.

16553998969 is a deficient number, since it is larger than the sum of its proper divisors (1).

16553998969 is an equidigital number, since it uses as much as digits as its factorization.

16553998969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141717600, while the sum is 70.

The spelling of 16553998969 in words is "sixteen billion, five hundred fifty-three million, nine hundred ninety-eight thousand, nine hundred sixty-nine".