2165914078 has 12 divisors (see below), whose sum is σ = 3262693680. Its totient is φ = 1078368956.

The previous prime is 2165914073. The next prime is 2165914081. The reversal of 2165914078 is 8704195612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165914073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104763 + ... + 123721.

It is an arithmetic number, because the mean of its divisors is an integer number (271891140).

Almost surely, 2^2165914078 is an apocalyptic number.

2165914078 is a deficient number, since it is larger than the sum of its proper divisors (1096779602).

2165914078 is an equidigital number, since it uses as much as digits as its factorization.

2165914078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19439 (or 19200 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 2165914078 is about 46539.3820113675. The cubic root of 2165914078 is about 1293.8395069567.

The spelling of 2165914078 in words is "two billion, one hundred sixty-five million, nine hundred fourteen thousand, seventy-eight".