194428538567 has 2 divisors, whose sum is σ = 194428538568. Its totient is φ = 194428538566.

The previous prime is 194428538519. The next prime is 194428538593. The reversal of 194428538567 is 765835824491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194428538567 - 2⁶ = 194428538503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194428532567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97214269283 + 97214269284.

It is an arithmetic number, because the mean of its divisors is an integer number (97214269284).

Almost surely, 2^194428538567 is an apocalyptic number.

194428538567 is a deficient number, since it is larger than the sum of its proper divisors (1).

194428538567 is an equidigital number, since it uses as much as digits as its factorization.

194428538567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58060800, while the sum is 62.

The spelling of 194428538567 in words is "one hundred ninety-four billion, four hundred twenty-eight million, five hundred thirty-eight thousand, five hundred sixty-seven".