195922055639 has 2 divisors, whose sum is σ = 195922055640. Its totient is φ = 195922055638.

The previous prime is 195922055611. The next prime is 195922055647. The reversal of 195922055639 is 936550229591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195922055639 is a prime.

It is a super-2 number, since 2×195922055639² (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 (195922055689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97961027819 + 97961027820.

It is an arithmetic number, because the mean of its divisors is an integer number (97961027820).

Almost surely, 2^195922055639 is an apocalyptic number.

195922055639 is a deficient number, since it is larger than the sum of its proper divisors (1).

195922055639 is an equidigital number, since it uses as much as digits as its factorization.

195922055639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561000, while the sum is 56.

The spelling of 195922055639 in words is "one hundred ninety-five billion, nine hundred twenty-two million, fifty-five thousand, six hundred thirty-nine".