195056445557 has 2 divisors, whose sum is σ = 195056445558. Its totient is φ = 195056445556.

The previous prime is 195056445539. The next prime is 195056445593. The reversal of 195056445557 is 755544650591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194312574481 + 743871076 = 440809^2 + 27274^2 .

It is a cyclic number.

It is not a de Polignac number, because 195056445557 - 2²⁰ = 195055396981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195056442557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97528222778 + 97528222779.

It is an arithmetic number, because the mean of its divisors is an integer number (97528222779).

Almost surely, 2^195056445557 is an apocalyptic number.

It is an amenable number.

195056445557 is a deficient number, since it is larger than the sum of its proper divisors (1).

195056445557 is an equidigital number, since it uses as much as digits as its factorization.

195056445557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900000, while the sum is 56.

The spelling of 195056445557 in words is "one hundred ninety-five billion, fifty-six million, four hundred forty-five thousand, five hundred fifty-seven".