2178702823 has 16 divisors (see below), whose sum is σ = 2412698400. Its totient is φ = 1950868480.

The previous prime is 2178702821. The next prime is 2178702829. The reversal of 2178702823 is 3282078712.

It is not a de Polignac number, because 2178702823 - 2¹ = 2178702821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178702821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259215 + ... + 267487.

It is an arithmetic number, because the mean of its divisors is an integer number (150793650).

Almost surely, 2^2178702823 is an apocalyptic number.

2178702823 is a deficient number, since it is larger than the sum of its proper divisors (233995577).

2178702823 is a wasteful number, since it uses less digits than its factorization.

2178702823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8642.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 2178702823 is about 46676.5768132154. The cubic root of 2178702823 is about 1296.3810240927.

The spelling of 2178702823 in words is "two billion, one hundred seventy-eight million, seven hundred two thousand, eight hundred twenty-three".