161879955 has 8 divisors (see below), whose sum is σ = 259007952. Its totient is φ = 86335968.

The previous prime is 161879917. The next prime is 161879969. The reversal of 161879955 is 559978161.

161879955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161879955 - 2¹² = 161875859 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 161879898 and 161879907.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5395984 + ... + 5396013.

It is an arithmetic number, because the mean of its divisors is an integer number (32375994).

Almost surely, 2^161879955 is an apocalyptic number.

161879955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161879955 is a deficient number, since it is larger than the sum of its proper divisors (97127997).

161879955 is a wasteful number, since it uses less digits than its factorization.

161879955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10792005.

The product of its digits is 680400, while the sum is 51.

The square root of 161879955 is about 12723.2053744330. The cubic root of 161879955 is about 545.0014925751.

The spelling of 161879955 in words is "one hundred sixty-one million, eight hundred seventy-nine thousand, nine hundred fifty-five".