16387378914749 has 2 divisors, whose sum is σ = 16387378914750. Its totient is φ = 16387378914748.

The previous prime is 16387378914733. The next prime is 16387378914827. The reversal of 16387378914749 is 94741987378361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14402647386724 + 1984731528025 = 3795082^2 + 1408805^2 .

It is a cyclic number.

It is not a de Polignac number, because 16387378914749 - 2⁴ = 16387378914733 is a prime.

It is a super-2 number, since 2×16387378914749² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16387378914749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16387378914449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8193689457374 + 8193689457375.

It is an arithmetic number, because the mean of its divisors is an integer number (8193689457375).

Almost surely, 2^{16387378914749} is an apocalyptic number.

It is an amenable number.

16387378914749 is a deficient number, since it is larger than the sum of its proper divisors (1).

16387378914749 is an equidigital number, since it uses as much as digits as its factorization.

16387378914749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536288768, while the sum is 77.

The spelling of 16387378914749 in words is "sixteen trillion, three hundred eighty-seven billion, three hundred seventy-eight million, nine hundred fourteen thousand, seven hundred forty-nine".