161000111345451 has 16 divisors (see below), whose sum is σ = 245340172482048. Its totient is φ = 91997562571200.

The previous prime is 161000111345429. The next prime is 161000111345467. The reversal of 161000111345451 is 154543111000161.

It is a happy number.

It is not a de Polignac number, because 161000111345451 - 2¹⁰ = 161000111344427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161000111345401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103419610 + ... + 104964831.

It is an arithmetic number, because the mean of its divisors is an integer number (15333760780128).

Almost surely, 2^{161000111345451} is an apocalyptic number.

161000111345451 is a deficient number, since it is larger than the sum of its proper divisors (84340061136597).

161000111345451 is a wasteful number, since it uses less digits than its factorization.

161000111345451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208421242.

The product of its (nonzero) digits is 7200, while the sum is 33.

The spelling of 161000111345451 in words is "one hundred sixty-one trillion, one hundred eleven million, three hundred forty-five thousand, four hundred fifty-one".