161577841133 has 4 divisors (see below), whose sum is σ = 161581034208. Its totient is φ = 161574648060.

The previous prime is 161577841127. The next prime is 161577841141. The reversal of 161577841133 is 331148775161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161577841133 - 2⁸ = 161577840877 is a prime.

It is a super-2 number, since 2×161577841133² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161577841163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519391 + ... + 1622252.

It is an arithmetic number, because the mean of its divisors is an integer number (40395258552).

Almost surely, 2^161577841133 is an apocalyptic number.

It is an amenable number.

161577841133 is a deficient number, since it is larger than the sum of its proper divisors (3193075).

161577841133 is an equidigital number, since it uses as much as digits as its factorization.

161577841133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3193074.

The product of its digits is 423360, while the sum is 47.

The spelling of 161577841133 in words is "one hundred sixty-one billion, five hundred seventy-seven million, eight hundred forty-one thousand, one hundred thirty-three".