999953670536663 has 2 divisors, whose sum is σ = 999953670536664. Its totient is φ = 999953670536662.

The previous prime is 999953670536549. The next prime is 999953670536669. The reversal of 999953670536663 is 366635076359999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999953670536663 - 2²⁸ = 999953402101207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999953670536669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499976835268331 + 499976835268332.

It is an arithmetic number, because the mean of its divisors is an integer number (499976835268332).

Almost surely, 2^{999953670536663} is an apocalyptic number.

999953670536663 is a deficient number, since it is larger than the sum of its proper divisors (1).

999953670536663 is an equidigital number, since it uses as much as digits as its factorization.

999953670536663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40176939600, while the sum is 86.

The spelling of 999953670536663 in words is "nine hundred ninety-nine trillion, nine hundred fifty-three billion, six hundred seventy million, five hundred thirty-six thousand, six hundred sixty-three".