12195953890819 has 2 divisors, whose sum is σ = 12195953890820. Its totient is φ = 12195953890818.

The previous prime is 12195953890807. The next prime is 12195953890859. The reversal of 12195953890819 is 91809835959121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12195953890819 - 2⁵ = 12195953890787 is a prime.

It is a super-2 number, since 2×12195953890819² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12195953890859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6097976945409 + 6097976945410.

It is an arithmetic number, because the mean of its divisors is an integer number (6097976945410).

Almost surely, 2^{12195953890819} is an apocalyptic number.

12195953890819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12195953890819 is an equidigital number, since it uses as much as digits as its factorization.

12195953890819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62985600, while the sum is 70.

The spelling of 12195953890819 in words is "twelve trillion, one hundred ninety-five billion, nine hundred fifty-three million, eight hundred ninety thousand, eight hundred nineteen".