2174971878 has 16 divisors (see below), whose sum is σ = 4833270960. Its totient is φ = 724990608.

The previous prime is 2174971871. The next prime is 2174971913. The reversal of 2174971878 is 8781794712.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 40277257 = 2174971878 / (2 + 1 + 7 + 4 + 9 + 7 + 1 + 8 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2174971871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20138575 + ... + 20138682.

It is an arithmetic number, because the mean of its divisors is an integer number (302079435).

Almost surely, 2^2174971878 is an apocalyptic number.

2174971878 is an abundant number, since it is smaller than the sum of its proper divisors (2658299082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2174971878 is a wasteful number, since it uses less digits than its factorization.

2174971878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40277268 (or 40277262 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 54.

The square root of 2174971878 is about 46636.5937649825. The cubic root of 2174971878 is about 1295.6406003596.

The spelling of 2174971878 in words is "two billion, one hundred seventy-four million, nine hundred seventy-one thousand, eight hundred seventy-eight".