161878148 has 36 divisors (see below), whose sum is σ = 302725332. Its totient is φ = 75724800.

The previous prime is 161878139. The next prime is 161878169. The reversal of 161878148 is 841878161.

It can be written as a sum of positive squares in 6 ways, for example, as 16386304 + 145491844 = 4048^2 + 12062^2 .

It is a super-3 number, since 3×161878148³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161878099 and 161878108.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269048 + ... + 269648.

It is an arithmetic number, because the mean of its divisors is an integer number (8409037).

Almost surely, 2^161878148 is an apocalyptic number.

It is an amenable number.

161878148 is a deficient number, since it is larger than the sum of its proper divisors (140847184).

161878148 is a wasteful number, since it uses less digits than its factorization.

161878148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 853 counting only the distinct ones).

The product of its digits is 86016, while the sum is 44.

The square root of 161878148 is about 12723.1343622552. The cubic root of 161878148 is about 544.9994646910. Note that the first 3 decimals are identical.

The spelling of 161878148 in words is "one hundred sixty-one million, eight hundred seventy-eight thousand, one hundred forty-eight".