161634411442 has 48 divisors (see below), whose sum is σ = 283368375000. Its totient is φ = 68945071104.

The previous prime is 161634411431. The next prime is 161634411467. The reversal of 161634411442 is 244114436161.

It can be written as a sum of positive squares in 4 ways, for example, as 142476806521 + 19157604921 = 377461^2 + 138411^2 .

It is a super-2 number, since 2×161634411442² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 32923684 + ... + 32928592.

Almost surely, 2^161634411442 is an apocalyptic number.

161634411442 is a deficient number, since it is larger than the sum of its proper divisors (121733963558).

161634411442 is a wasteful number, since it uses less digits than its factorization.

161634411442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443 (or 6436 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The spelling of 161634411442 in words is "one hundred sixty-one billion, six hundred thirty-four million, four hundred eleven thousand, four hundred forty-two".