161533176393 has 16 divisors (see below), whose sum is σ = 219555354816. Its totient is φ = 105602003520.

The previous prime is 161533176383. The next prime is 161533176397. The reversal of 161533176393 is 393671335161.

It is not a de Polignac number, because 161533176393 - 2⁵ = 161533176361 is a prime.

It is a super-2 number, since 2×161533176393² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161533176397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43971 + ... + 570087.

It is an arithmetic number, because the mean of its divisors is an integer number (13722209676).

Almost surely, 2^161533176393 is an apocalyptic number.

It is an amenable number.

161533176393 is a deficient number, since it is larger than the sum of its proper divisors (58022178423).

161533176393 is a wasteful number, since it uses less digits than its factorization.

161533176393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528104.

The product of its digits is 918540, while the sum is 48.

The spelling of 161533176393 in words is "one hundred sixty-one billion, five hundred thirty-three million, one hundred seventy-six thousand, three hundred ninety-three".