2180172774 has 32 divisors (see below), whose sum is σ = 4847238144. Its totient is φ = 649182240.

The previous prime is 2180172773. The next prime is 2180172781. The reversal of 2180172774 is 4772710812.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180172773) 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 15 ways as a sum of consecutive naturals, for example, 448404 + ... + 453239.

It is an arithmetic number, because the mean of its divisors is an integer number (151476192).

Almost surely, 2^2180172774 is an apocalyptic number.

2180172774 is an abundant number, since it is smaller than the sum of its proper divisors (2667065370).

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

2180172774 is a wasteful number, since it uses less digits than its factorization.

2180172774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901692.

The product of its (nonzero) digits is 43904, while the sum is 39.

The square root of 2180172774 is about 46692.3202893152. The cubic root of 2180172774 is about 1296.6725107143.

The spelling of 2180172774 in words is "two billion, one hundred eighty million, one hundred seventy-two thousand, seven hundred seventy-four".