161233541366 has 4 divisors (see below), whose sum is σ = 241850312052. Its totient is φ = 80616770682.

The previous prime is 161233541351. The next prime is 161233541401. The reversal of 161233541366 is 663145332161.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×161233541366² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40308385340 + ... + 40308385343.

It is an arithmetic number, because the mean of its divisors is an integer number (60462578013).

Almost surely, 2^161233541366 is an apocalyptic number.

161233541366 is a deficient number, since it is larger than the sum of its proper divisors (80616770686).

161233541366 is an equidigital number, since it uses as much as digits as its factorization.

161233541366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80616770685.

The product of its digits is 233280, while the sum is 41.

The spelling of 161233541366 in words is "one hundred sixty-one billion, two hundred thirty-three million, five hundred forty-one thousand, three hundred sixty-six".