16000025999989 has 2 divisors, whose sum is σ = 16000025999990. Its totient is φ = 16000025999988.

The previous prime is 16000025999987. The next prime is 16000026000031. The reversal of 16000025999989 is 98999952000061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15950702031889 + 49323968100 = 3993833^2 + 222090^2 .

It is a cyclic number.

It is not a de Polignac number, because 16000025999989 - 2¹ = 16000025999987 is a prime.

Together with 16000025999987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16000025999987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8000012999994 + 8000012999995.

It is an arithmetic number, because the mean of its divisors is an integer number (8000012999995).

Almost surely, 2^{16000025999989} is an apocalyptic number.

It is an amenable number.

16000025999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16000025999989 is an equidigital number, since it uses as much as digits as its factorization.

16000025999989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28343520, while the sum is 67.

The spelling of 16000025999989 in words is "sixteen trillion, twenty-five million, nine hundred ninety-nine thousand, nine hundred eighty-nine".