161345155442 has 16 divisors (see below), whose sum is σ = 244180214712. Its totient is φ = 79951872000.

The previous prime is 161345155429. The next prime is 161345155451. The reversal of 161345155442 is 244551543161.

161345155442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 84803846521 + 76541308921 = 291211^2 + 276661^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161345155442.

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, 3593918 + ... + 3638534.

Almost surely, 2^161345155442 is an apocalyptic number.

161345155442 is a deficient number, since it is larger than the sum of its proper divisors (82835059270).

161345155442 is a wasteful number, since it uses less digits than its factorization.

161345155442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60733.

The product of its digits is 288000, while the sum is 41.

The spelling of 161345155442 in words is "one hundred sixty-one billion, three hundred forty-five million, one hundred fifty-five thousand, four hundred forty-two".