16754191994381 has 2 divisors, whose sum is σ = 16754191994382. Its totient is φ = 16754191994380.

The previous prime is 16754191994317. The next prime is 16754191994411. The reversal of 16754191994381 is 18349919145761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9332566755625 + 7421625238756 = 3054925^2 + 2724266^2 .

It is a cyclic number.

It is not a de Polignac number, because 16754191994381 - 2⁶ = 16754191994317 is a prime.

It is a super-2 number, since 2×16754191994381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16754191984381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8377095997190 + 8377095997191.

It is an arithmetic number, because the mean of its divisors is an integer number (8377095997191).

Almost surely, 2^{16754191994381} is an apocalyptic number.

It is an amenable number.

16754191994381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16754191994381 is an equidigital number, since it uses as much as digits as its factorization.

16754191994381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 68.

The spelling of 16754191994381 in words is "sixteen trillion, seven hundred fifty-four billion, one hundred ninety-one million, nine hundred ninety-four thousand, three hundred eighty-one".