195031658819 has 2 divisors, whose sum is σ = 195031658820. Its totient is φ = 195031658818.

The previous prime is 195031658749. The next prime is 195031658851. The reversal of 195031658819 is 918856130591.

195031658819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195031658819 is a prime.

It is a super-2 number, since 2×195031658819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195031658879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97515829409 + 97515829410.

It is an arithmetic number, because the mean of its divisors is an integer number (97515829410).

Almost surely, 2^195031658819 is an apocalyptic number.

195031658819 is a deficient number, since it is larger than the sum of its proper divisors (1).

195031658819 is an equidigital number, since it uses as much as digits as its factorization.

195031658819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 56.

The spelling of 195031658819 in words is "one hundred ninety-five billion, thirty-one million, six hundred fifty-eight thousand, eight hundred nineteen".