188402442479 has 2 divisors, whose sum is σ = 188402442480. Its totient is φ = 188402442478.

The previous prime is 188402442469. The next prime is 188402442497. The reversal of 188402442479 is 974244204881.

It is a happy number.

Together with next prime (188402442497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 188402442479 - 2²⁴ = 188385665263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188402442479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188402442469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94201221239 + 94201221240.

It is an arithmetic number, because the mean of its divisors is an integer number (94201221240).

Almost surely, 2^188402442479 is an apocalyptic number.

188402442479 is a deficient number, since it is larger than the sum of its proper divisors (1).

188402442479 is an equidigital number, since it uses as much as digits as its factorization.

188402442479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4128768, while the sum is 53.

The spelling of 188402442479 in words is "one hundred eighty-eight billion, four hundred two million, four hundred forty-two thousand, four hundred seventy-nine".