161500011100037 has 2 divisors, whose sum is σ = 161500011100038. Its totient is φ = 161500011100036.

The previous prime is 161500011100013. The next prime is 161500011100091. The reversal of 161500011100037 is 730001110005161.

161500011100037 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89975677773601 + 71524333326436 = 9485551^2 + 8457206^2 .

It is a cyclic number.

It is not a de Polignac number, because 161500011100037 - 2²² = 161500006905733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161500011099979 and 161500011100015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161500011100007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80750005550018 + 80750005550019.

It is an arithmetic number, because the mean of its divisors is an integer number (80750005550019).

Almost surely, 2^{161500011100037} is an apocalyptic number.

It is an amenable number.

161500011100037 is a deficient number, since it is larger than the sum of its proper divisors (1).

161500011100037 is an equidigital number, since it uses as much as digits as its factorization.

161500011100037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 26.

Adding to 161500011100037 its reverse (730001110005161), we get a palindrome (891501121105198).

The spelling of 161500011100037 in words is "one hundred sixty-one trillion, five hundred billion, eleven million, one hundred thousand, thirty-seven".