161934987141 has 24 divisors (see below), whose sum is σ = 238682676960. Its totient is φ = 105764574816.

The previous prime is 161934986981. The next prime is 161934987209. The reversal of 161934987141 is 141789439161.

It is a happy number.

161934987141 is a `hidden beast` number, since 1 + 6 + 1 + 9 + 3 + 498 + 7 + 141 = 666.

161934987141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161934987141 - 2¹⁰ = 161934986117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161934987541) 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 23 ways as a sum of consecutive naturals, for example, 364831 + ... + 675996.

It is an arithmetic number, because the mean of its divisors is an integer number (9945111540).

Almost surely, 2^161934987141 is an apocalyptic number.

It is an amenable number.

161934987141 is a deficient number, since it is larger than the sum of its proper divisors (76747689819).

161934987141 is a wasteful number, since it uses less digits than its factorization.

161934987141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041185 (or 1041182 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The spelling of 161934987141 in words is "one hundred sixty-one billion, nine hundred thirty-four million, nine hundred eighty-seven thousand, one hundred forty-one".