16451490951361 has 2 divisors, whose sum is σ = 16451490951362. Its totient is φ = 16451490951360.

The previous prime is 16451490951359. The next prime is 16451490951373. The reversal of 16451490951361 is 16315909415461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16313270582961 + 138220368400 = 4038969^2 + 371780^2 .

It is an emirp because it is prime and its reverse (16315909415461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16451490951361 - 2¹ = 16451490951359 is a prime.

Together with 16451490951359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16451490951391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8225745475680 + 8225745475681.

It is an arithmetic number, because the mean of its divisors is an integer number (8225745475681).

Almost surely, 2^{16451490951361} is an apocalyptic number.

It is an amenable number.

16451490951361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16451490951361 is an equidigital number, since it uses as much as digits as its factorization.

16451490951361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 55.

The spelling of 16451490951361 in words is "sixteen trillion, four hundred fifty-one billion, four hundred ninety million, nine hundred fifty-one thousand, three hundred sixty-one".