999999999913361 has 2 divisors, whose sum is σ = 999999999913362. Its totient is φ = 999999999913360.

The previous prime is 999999999913301. The next prime is 999999999913367. The reversal of 999999999913361 is 163319999999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 992899006090000 + 7100993823361 = 31510300^2 + 2664769^2 .

It is a cyclic number.

It is not a de Polignac number, because 999999999913361 - 2³⁰ = 999998926171537 is a prime.

It is not a weakly prime, because it can be changed into another prime (999999999913367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999999956680 + 499999999956681.

It is an arithmetic number, because the mean of its divisors is an integer number (499999999956681).

Almost surely, 2^{999999999913361} is an apocalyptic number.

It is an amenable number.

999999999913361 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999999913361 is an equidigital number, since it uses as much as digits as its factorization.

999999999913361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188286357654, while the sum is 104.

The spelling of 999999999913361 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred thirteen thousand, three hundred sixty-one".