199056558439 has 2 divisors, whose sum is σ = 199056558440. Its totient is φ = 199056558438.

The previous prime is 199056558433. The next prime is 199056558497. The reversal of 199056558439 is 934855650991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199056558439 - 2³ = 199056558431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199056558431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99528279219 + 99528279220.

It is an arithmetic number, because the mean of its divisors is an integer number (99528279220).

Almost surely, 2^199056558439 is an apocalyptic number.

199056558439 is a deficient number, since it is larger than the sum of its proper divisors (1).

199056558439 is an equidigital number, since it uses as much as digits as its factorization.

199056558439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488000, while the sum is 64.

The spelling of 199056558439 in words is "one hundred ninety-nine billion, fifty-six million, five hundred fifty-eight thousand, four hundred thirty-nine".