999998477238511 has 2 divisors, whose sum is σ = 999998477238512. Its totient is φ = 999998477238510.

The previous prime is 999998477238389. The next prime is 999998477238557. The reversal of 999998477238511 is 115832774899999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999998477238511 - 2²⁹ = 999997940367599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998477238011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999238619255 + 499999238619256.

It is an arithmetic number, because the mean of its divisors is an integer number (499999238619256).

Almost surely, 2^{999998477238511} is an apocalyptic number.

999998477238511 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998477238511 is an equidigital number, since it uses as much as digits as its factorization.

999998477238511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22221319680, while the sum is 91.

The spelling of 999998477238511 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, four hundred seventy-seven million, two hundred thirty-eight thousand, five hundred eleven".