161121754442 has 16 divisors (see below), whose sum is σ = 265987003392. Its totient is φ = 72589043520.

The previous prime is 161121754429. The next prime is 161121754463. The reversal of 161121754442 is 244457121161.

161121754442 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161121754396 and 161121754405.

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 7 ways as a sum of consecutive naturals, for example, 32403338 + ... + 32408309.

It is an arithmetic number, because the mean of its divisors is an integer number (16624187712).

Almost surely, 2^161121754442 is an apocalyptic number.

161121754442 is a deficient number, since it is larger than the sum of its proper divisors (104865248950).

161121754442 is a wasteful number, since it uses less digits than its factorization.

161121754442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64811773.

The product of its digits is 53760, while the sum is 38.

The spelling of 161121754442 in words is "one hundred sixty-one billion, one hundred twenty-one million, seven hundred fifty-four thousand, four hundred forty-two".