16454406569 has 2 divisors, whose sum is σ = 16454406570. Its totient is φ = 16454406568.

The previous prime is 16454406547. The next prime is 16454406571. The reversal of 16454406569 is 96560445461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15445518400 + 1008888169 = 124280^2 + 31763^2 .

It is a cyclic number.

It is not a de Polignac number, because 16454406569 - 2¹² = 16454402473 is a prime.

It is a super-2 number, since 2×16454406569² (a number of 21 digits) contains 22 as substring.

Together with 16454406571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16454406169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8227203284 + 8227203285.

It is an arithmetic number, because the mean of its divisors is an integer number (8227203285).

Almost surely, 2^16454406569 is an apocalyptic number.

It is an amenable number.

16454406569 is a deficient number, since it is larger than the sum of its proper divisors (1).

16454406569 is an equidigital number, since it uses as much as digits as its factorization.

16454406569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 16454406569 in words is "sixteen billion, four hundred fifty-four million, four hundred six thousand, five hundred sixty-nine".