102990817161 has 24 divisors (see below), whose sum is σ = 151016119176. Its totient is φ = 67628390400.

The previous prime is 102990817159. The next prime is 102990817229. The reversal of 102990817161 is 161718099201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26391951936 + 76598865225 = 162456^2 + 276765^2 .

It is not a de Polignac number, because 102990817161 - 2¹ = 102990817159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102990817561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118090 + ... + 468963.

It is an arithmetic number, because the mean of its divisors is an integer number (6292338299).

Almost surely, 2^102990817161 is an apocalyptic number.

It is an amenable number.

102990817161 is a deficient number, since it is larger than the sum of its proper divisors (48025302015).

102990817161 is a wasteful number, since it uses less digits than its factorization.

102990817161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587353 (or 587350 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 45.

The spelling of 102990817161 in words is "one hundred two billion, nine hundred ninety million, eight hundred seventeen thousand, one hundred sixty-one".