181964123142 has 16 divisors (see below), whose sum is σ = 372391694400. Its totient is φ = 59244133032.

The previous prime is 181964123141. The next prime is 181964123153. The reversal of 181964123142 is 241321469181.

It is a super-2 number, since 2×181964123142² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181964123094 and 181964123103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181964123141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352643392 + ... + 352643907.

It is an arithmetic number, because the mean of its divisors is an integer number (23274480900).

Almost surely, 2^181964123142 is an apocalyptic number.

181964123142 is an abundant number, since it is smaller than the sum of its proper divisors (190427571258).

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

181964123142 is a wasteful number, since it uses less digits than its factorization.

181964123142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705287347.

The product of its digits is 82944, while the sum is 42.

The spelling of 181964123142 in words is "one hundred eighty-one billion, nine hundred sixty-four million, one hundred twenty-three thousand, one hundred forty-two".