161156278148 has 12 divisors (see below), whose sum is σ = 282440069772. Its totient is φ = 80459115360.

The previous prime is 161156278147. The next prime is 161156278181. The reversal of 161156278148 is 841872651161.

It can be written as a sum of positive squares in 2 ways, for example, as 160321761604 + 834516544 = 400402^2 + 28888^2 .

It is a super-3 number, since 3×161156278148³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161156278096 and 161156278105.

It is not an unprimeable number, because it can be changed into a prime (161156278141) 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 3 ways as a sum of consecutive naturals, for example, 29752883 + ... + 29758298.

It is an arithmetic number, because the mean of its divisors is an integer number (23536672481).

Almost surely, 2^161156278148 is an apocalyptic number.

It is an amenable number.

161156278148 is a deficient number, since it is larger than the sum of its proper divisors (121283791624).

161156278148 is a wasteful number, since it uses less digits than its factorization.

161156278148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59511862 (or 59511860 counting only the distinct ones).

The product of its digits is 645120, while the sum is 50.

The spelling of 161156278148 in words is "one hundred sixty-one billion, one hundred fifty-six million, two hundred seventy-eight thousand, one hundred forty-eight".