161211364412 has 24 divisors (see below), whose sum is σ = 341388772704. Its totient is φ = 65026432512.

The previous prime is 161211364399. The next prime is 161211364417. The reversal of 161211364412 is 214463112161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161211364417) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 169339193 + ... + 169340144.

It is an arithmetic number, because the mean of its divisors is an integer number (14224532196).

Almost surely, 2^161211364412 is an apocalyptic number.

It is an amenable number.

161211364412 is an abundant number, since it is smaller than the sum of its proper divisors (180177408292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161211364412 is a wasteful number, since it uses less digits than its factorization.

161211364412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338679365 (or 338679363 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

Adding to 161211364412 its reverse (214463112161), we get a palindrome (375674476573).

The spelling of 161211364412 in words is "one hundred sixty-one billion, two hundred eleven million, three hundred sixty-four thousand, four hundred twelve".