1868191712479 has 2 divisors, whose sum is σ = 1868191712480. Its totient is φ = 1868191712478.

The previous prime is 1868191712383. The next prime is 1868191712489. The reversal of 1868191712479 is 9742171918681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1868191712479 - 2²³ = 1868183323871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1868191712479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868191712489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934095856239 + 934095856240.

It is an arithmetic number, because the mean of its divisors is an integer number (934095856240).

Almost surely, 2^{1868191712479} is an apocalyptic number.

1868191712479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868191712479 is an equidigital number, since it uses as much as digits as its factorization.

1868191712479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 64.

The spelling of 1868191712479 in words is "one trillion, eight hundred sixty-eight billion, one hundred ninety-one million, seven hundred twelve thousand, four hundred seventy-nine".