161406105237 has 12 divisors (see below), whose sum is σ = 251076163884. Its totient is φ = 99326833920.

The previous prime is 161406105233. The next prime is 161406105247. The reversal of 161406105237 is 732501604161.

161406105237 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 0 + 610 + 5 + 2 + 37 = 666.

161406105237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 104513837796 + 56892267441 = 323286^2 + 238521^2 .

It is not a de Polignac number, because 161406105237 - 2² = 161406105233 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161406105233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 689769564 + ... + 689769797.

It is an arithmetic number, because the mean of its divisors is an integer number (20923013657).

Almost surely, 2^161406105237 is an apocalyptic number.

It is an amenable number.

161406105237 is a deficient number, since it is larger than the sum of its proper divisors (89670058647).

161406105237 is a wasteful number, since it uses less digits than its factorization.

161406105237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379539380 (or 1379539377 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Adding to 161406105237 its reverse (732501604161), we get a palindrome (893907709398).

The spelling of 161406105237 in words is "one hundred sixty-one billion, four hundred six million, one hundred five thousand, two hundred thirty-seven".