994153136161 has 2 divisors, whose sum is σ = 994153136162. Its totient is φ = 994153136160.

The previous prime is 994153136129. The next prime is 994153136201. The reversal of 994153136161 is 161631351499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603603132561 + 390550003600 = 776919^2 + 624940^2 .

It is a cyclic number.

It is not a de Polignac number, because 994153136161 - 2⁵ = 994153136129 is a prime.

It is not a weakly prime, because it can be changed into another prime (994153136101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497076568080 + 497076568081.

It is an arithmetic number, because the mean of its divisors is an integer number (497076568081).

Almost surely, 2^994153136161 is an apocalyptic number.

It is an amenable number.

994153136161 is a deficient number, since it is larger than the sum of its proper divisors (1).

994153136161 is an equidigital number, since it uses as much as digits as its factorization.

994153136161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 49.

The spelling of 994153136161 in words is "nine hundred ninety-four billion, one hundred fifty-three million, one hundred thirty-six thousand, one hundred sixty-one".