15120161155181 has 2 divisors, whose sum is σ = 15120161155182. Its totient is φ = 15120161155180.

The previous prime is 15120161155159. The next prime is 15120161155199. The reversal of 15120161155181 is 18155116102151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11761408519081 + 3358752636100 = 3429491^2 + 1832690^2 .

It is a cyclic number.

It is not a de Polignac number, because 15120161155181 - 2⁶ = 15120161155117 is a prime.

It is a super-3 number, since 3×15120161155181³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15120161155111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560080577590 + 7560080577591.

It is an arithmetic number, because the mean of its divisors is an integer number (7560080577591).

Almost surely, 2^{15120161155181} is an apocalyptic number.

It is an amenable number.

15120161155181 is a deficient number, since it is larger than the sum of its proper divisors (1).

15120161155181 is an equidigital number, since it uses as much as digits as its factorization.

15120161155181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 38.

The spelling of 15120161155181 in words is "fifteen trillion, one hundred twenty billion, one hundred sixty-one million, one hundred fifty-five thousand, one hundred eighty-one".