161140435345 has 16 divisors (see below), whose sum is σ = 194449202640. Its totient is φ = 128193593344.

The previous prime is 161140435307. The next prime is 161140435349. The reversal of 161140435345 is 543534041161.

161140435345 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 8 ways, for example, as 18704391696 + 142436043649 = 136764^2 + 377407^2 .

It is a cyclic number.

It is not a de Polignac number, because 161140435345 - 2³⁷ = 23701481873 is a prime.

It is a super-2 number, since 2×161140435345² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161140435349) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 656271 + ... + 867739.

It is an arithmetic number, because the mean of its divisors is an integer number (12153075165).

Almost surely, 2^161140435345 is an apocalyptic number.

It is an amenable number.

161140435345 is a deficient number, since it is larger than the sum of its proper divisors (33308767295).

161140435345 is a wasteful number, since it uses less digits than its factorization.

161140435345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212324.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 161140435345 in words is "one hundred sixty-one billion, one hundred forty million, four hundred thirty-five thousand, three hundred forty-five".