193516421796443 has 2 divisors, whose sum is σ = 193516421796444. Its totient is φ = 193516421796442.

The previous prime is 193516421796317. The next prime is 193516421796547. The reversal of 193516421796443 is 344697124615391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 193516421796443 - 2¹² = 193516421792347 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 193516421796443.

It is not a weakly prime, because it can be changed into another prime (193516421726443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96758210898221 + 96758210898222.

It is an arithmetic number, because the mean of its divisors is an integer number (96758210898222).

Almost surely, 2^{193516421796443} is an apocalyptic number.

193516421796443 is a deficient number, since it is larger than the sum of its proper divisors (1).

193516421796443 is an equidigital number, since it uses as much as digits as its factorization.

193516421796443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 65.

The spelling of 193516421796443 in words is "one hundred ninety-three trillion, five hundred sixteen billion, four hundred twenty-one million, seven hundred ninety-six thousand, four hundred forty-three".