2078170155 has 32 divisors (see below), whose sum is σ = 3749683200. Its totient is φ = 1091810016.

The previous prime is 2078170123. The next prime is 2078170169. The reversal of 2078170155 is 5510718702.

It is not a de Polignac number, because 2078170155 - 2⁵ = 2078170123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105835 + ... + 123924.

It is an arithmetic number, because the mean of its divisors is an integer number (117177600).

Almost surely, 2^2078170155 is an apocalyptic number.

2078170155 is a deficient number, since it is larger than the sum of its proper divisors (1671513045).

2078170155 is a wasteful number, since it uses less digits than its factorization.

2078170155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229840 (or 229834 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 2078170155 is about 45586.9515870496. The cubic root of 2078170155 is about 1276.1264232318.

Adding to 2078170155 its reverse (5510718702), we get a palindrome (7588888857).

The spelling of 2078170155 in words is "two billion, seventy-eight million, one hundred seventy thousand, one hundred fifty-five".