161078155 has 8 divisors (see below), whose sum is σ = 220907232. Its totient is φ = 110453568.

The previous prime is 161078153. The next prime is 161078173. The reversal of 161078155 is 551870161.

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

It is a cyclic number.

It is not a de Polignac number, because 161078155 - 2¹ = 161078153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161078155.

It is not an unprimeable number, because it can be changed into a prime (161078153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301082 + ... + 2301151.

It is an arithmetic number, because the mean of its divisors is an integer number (27613404).

Almost surely, 2^161078155 is an apocalyptic number.

161078155 is a deficient number, since it is larger than the sum of its proper divisors (59829077).

161078155 is an equidigital number, since it uses as much as digits as its factorization.

161078155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602245.

The product of its (nonzero) digits is 8400, while the sum is 34.

The square root of 161078155 is about 12691.6569052272. The cubic root of 161078155 is about 544.1001957800.

The spelling of 161078155 in words is "one hundred sixty-one million, seventy-eight thousand, one hundred fifty-five".