194071620851 has 2 divisors, whose sum is σ = 194071620852. Its totient is φ = 194071620850.

The previous prime is 194071620839. The next prime is 194071620859. The reversal of 194071620851 is 158026170491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194071620851 - 2¹⁰ = 194071619827 is a prime.

It is not a weakly prime, because it can be changed into another prime (194071620859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97035810425 + 97035810426.

It is an arithmetic number, because the mean of its divisors is an integer number (97035810426).

Almost surely, 2^194071620851 is an apocalyptic number.

194071620851 is a deficient number, since it is larger than the sum of its proper divisors (1).

194071620851 is an equidigital number, since it uses as much as digits as its factorization.

194071620851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 194071620851 in words is "one hundred ninety-four billion, seventy-one million, six hundred twenty thousand, eight hundred fifty-one".