161155512028541 has 2 divisors, whose sum is σ = 161155512028542. Its totient is φ = 161155512028540.

The previous prime is 161155512028487. The next prime is 161155512028613. The reversal of 161155512028541 is 145820215551161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115138350904516 + 46017161124025 = 10730254^2 + 6783595^2 .

It is an emirp because it is prime and its reverse (145820215551161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161155512028541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161155512028141) 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 as a sum of consecutive naturals, namely, 80577756014270 + 80577756014271.

It is an arithmetic number, because the mean of its divisors is an integer number (80577756014271).

Almost surely, 2^{161155512028541} is an apocalyptic number.

It is an amenable number.

161155512028541 is a deficient number, since it is larger than the sum of its proper divisors (1).

161155512028541 is an equidigital number, since it uses as much as digits as its factorization.

161155512028541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480000, while the sum is 47.

The spelling of 161155512028541 in words is "one hundred sixty-one trillion, one hundred fifty-five billion, five hundred twelve million, twenty-eight thousand, five hundred forty-one".