161288017443 has 24 divisors (see below), whose sum is σ = 268741594368. Its totient is φ = 91303226352.

The previous prime is 161288017427. The next prime is 161288017453. The reversal of 161288017443 is 344710882161.

161288017443 is a `hidden beast` number, since 1 + 6 + 128 + 80 + 1 + 7 + 443 = 666.

It is not a de Polignac number, because 161288017443 - 2⁴ = 161288017427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161288017453) 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, 11956471 + ... + 11969952.

It is an arithmetic number, because the mean of its divisors is an integer number (11197566432).

Almost surely, 2^161288017443 is an apocalyptic number.

161288017443 is a deficient number, since it is larger than the sum of its proper divisors (107453576925).

161288017443 is a wasteful number, since it uses less digits than its factorization.

161288017443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23926543 (or 23926540 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 161288017443 in words is "one hundred sixty-one billion, two hundred eighty-eight million, seventeen thousand, four hundred forty-three".