191863056433 has 2 divisors, whose sum is σ = 191863056434. Its totient is φ = 191863056432.

The previous prime is 191863056361. The next prime is 191863056461. The reversal of 191863056433 is 334650368191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131647785889 + 60215270544 = 362833^2 + 245388^2 .

It is a cyclic number.

It is not a de Polignac number, because 191863056433 - 2²⁹ = 191326185521 is a prime.

It is a super-2 number, since 2×191863056433² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191863056733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95931528216 + 95931528217.

It is an arithmetic number, because the mean of its divisors is an integer number (95931528217).

Almost surely, 2^191863056433 is an apocalyptic number.

It is an amenable number.

191863056433 is a deficient number, since it is larger than the sum of its proper divisors (1).

191863056433 is an equidigital number, since it uses as much as digits as its factorization.

191863056433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 191863056433 in words is "one hundred ninety-one billion, eight hundred sixty-three million, fifty-six thousand, four hundred thirty-three".