161211545246 has 4 divisors (see below), whose sum is σ = 241817317872. Its totient is φ = 80605772622.

The previous prime is 161211545233. The next prime is 161211545251. The reversal of 161211545246 is 642545112161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 642545112161 = 23 ⋅27936744007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40302886310 + ... + 40302886313.

It is an arithmetic number, because the mean of its divisors is an integer number (60454329468).

Almost surely, 2^161211545246 is an apocalyptic number.

161211545246 is a deficient number, since it is larger than the sum of its proper divisors (80605772626).

161211545246 is an equidigital number, since it uses as much as digits as its factorization.

161211545246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80605772625.

The product of its digits is 57600, while the sum is 38.

The spelling of 161211545246 in words is "one hundred sixty-one billion, two hundred eleven million, five hundred forty-five thousand, two hundred forty-six".