16402196457749 has 2 divisors, whose sum is σ = 16402196457750. Its totient is φ = 16402196457748.

The previous prime is 16402196457589. The next prime is 16402196457769. The reversal of 16402196457749 is 94775469120461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16060801653649 + 341394804100 = 4007593^2 + 584290^2 .

It is an emirp because it is prime and its reverse (94775469120461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16402196457749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16402196457769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8201098228874 + 8201098228875.

It is an arithmetic number, because the mean of its divisors is an integer number (8201098228875).

Almost surely, 2^{16402196457749} is an apocalyptic number.

It is an amenable number.

16402196457749 is a deficient number, since it is larger than the sum of its proper divisors (1).

16402196457749 is an equidigital number, since it uses as much as digits as its factorization.

16402196457749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91445760, while the sum is 65.

The spelling of 16402196457749 in words is "sixteen trillion, four hundred two billion, one hundred ninety-six million, four hundred fifty-seven thousand, seven hundred forty-nine".