161011929912 has 128 divisors (see below), whose sum is σ = 411959520000. Its totient is φ = 52431768576.

The previous prime is 161011929887. The next prime is 161011929929. The reversal of 161011929912 is 219929110161.

161011929912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67396014 + ... + 67398402.

It is an arithmetic number, because the mean of its divisors is an integer number (3218433750).

Almost surely, 2^161011929912 is an apocalyptic number.

161011929912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161011929912 is an abundant number, since it is smaller than the sum of its proper divisors (250947590088).

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

161011929912 is a wasteful number, since it uses less digits than its factorization.

161011929912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853 (or 2849 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 42.

The spelling of 161011929912 in words is "one hundred sixty-one billion, eleven million, nine hundred twenty-nine thousand, nine hundred twelve".