161368528311 has 24 divisors (see below), whose sum is σ = 233919117120. Its totient is φ = 107195961600.

The previous prime is 161368528231. The next prime is 161368528351. The reversal of 161368528311 is 113825863161.

161368528311 is a `hidden beast` number, since 1 + 6 + 1 + 368 + 5 + 283 + 1 + 1 = 666.

It is not a de Polignac number, because 161368528311 - 2¹³ = 161368520119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161368528351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3329331 + ... + 3377451.

It is an arithmetic number, because the mean of its divisors is an integer number (9746629880).

Almost surely, 2^161368528311 is an apocalyptic number.

161368528311 is a deficient number, since it is larger than the sum of its proper divisors (72550588809).

161368528311 is a wasteful number, since it uses less digits than its factorization.

161368528311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49447 (or 49444 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 161368528311 in words is "one hundred sixty-one billion, three hundred sixty-eight million, five hundred twenty-eight thousand, three hundred eleven".