505454250109979 has 2 divisors, whose sum is σ = 505454250109980. Its totient is φ = 505454250109978.

The previous prime is 505454250109973. The next prime is 505454250110039. The reversal of 505454250109979 is 979901052454505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505454250109979 is a prime.

It is not a weakly prime, because it can be changed into another prime (505454250109973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252727125054989 + 252727125054990.

It is an arithmetic number, because the mean of its divisors is an integer number (252727125054990).

Almost surely, 2^{505454250109979} is an apocalyptic number.

505454250109979 is a deficient number, since it is larger than the sum of its proper divisors (1).

505454250109979 is an equidigital number, since it uses as much as digits as its factorization.

505454250109979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060000, while the sum is 65.

The spelling of 505454250109979 in words is "five hundred five trillion, four hundred fifty-four billion, two hundred fifty million, one hundred nine thousand, nine hundred seventy-nine".