194154127669 has 2 divisors, whose sum is σ = 194154127670. Its totient is φ = 194154127668.

The previous prime is 194154127619. The next prime is 194154127711. The reversal of 194154127669 is 966721451491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192905424100 + 1248703569 = 439210^2 + 35337^2 .

It is a cyclic number.

It is not a de Polignac number, because 194154127669 - 2⁹ = 194154127157 is a prime.

It is a super-2 number, since 2×194154127669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194154127619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97077063834 + 97077063835.

It is an arithmetic number, because the mean of its divisors is an integer number (97077063835).

Almost surely, 2^194154127669 is an apocalyptic number.

It is an amenable number.

194154127669 is a deficient number, since it is larger than the sum of its proper divisors (1).

194154127669 is an equidigital number, since it uses as much as digits as its factorization.

194154127669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The spelling of 194154127669 in words is "one hundred ninety-four billion, one hundred fifty-four million, one hundred twenty-seven thousand, six hundred sixty-nine".