194071620451 has 2 divisors, whose sum is σ = 194071620452. Its totient is φ = 194071620450.

The previous prime is 194071620439. The next prime is 194071620473. The reversal of 194071620451 is 154026170491.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (154026170491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194071620451 - 2⁵ = 194071620419 is a prime.

It is not a weakly prime, because it can be changed into another prime (194071620851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97035810225 + 97035810226.

It is an arithmetic number, because the mean of its divisors is an integer number (97035810226).

Almost surely, 2^194071620451 is an apocalyptic number.

194071620451 is a deficient number, since it is larger than the sum of its proper divisors (1).

194071620451 is an equidigital number, since it uses as much as digits as its factorization.

194071620451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 194071620451 in words is "one hundred ninety-four billion, seventy-one million, six hundred twenty thousand, four hundred fifty-one".