1870378161 has 8 divisors (see below), whose sum is σ = 2507616384. Its totient is φ = 1240029360.

The previous prime is 1870378151. The next prime is 1870378217. The reversal of 1870378161 is 1618730781.

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

It is not a de Polignac number, because 1870378161 - 2⁵ = 1870378129 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1870378151) 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, 1721721 + ... + 1722806.

It is an arithmetic number, because the mean of its divisors is an integer number (313452048).

Almost surely, 2^1870378161 is an apocalyptic number.

It is an amenable number.

1870378161 is a deficient number, since it is larger than the sum of its proper divisors (637238223).

1870378161 is a wasteful number, since it uses less digits than its factorization.

1870378161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444711.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 1870378161 is about 43247.8688607890. The cubic root of 1870378161 is about 1232.0920092865.

The spelling of 1870378161 in words is "one billion, eight hundred seventy million, three hundred seventy-eight thousand, one hundred sixty-one".