2185736147172 has 48 divisors (see below), whose sum is σ = 5964971947200. Its totient is φ = 690232466880.

The previous prime is 2185736147143. The next prime is 2185736147173. The reversal of 2185736147172 is 2717416375812.

2185736147172 is a `hidden beast` number, since 2 + 1 + 8 + 5 + 7 + 3 + 614 + 7 + 17 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2185736147173) 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, 532584729 + ... + 532588832.

It is an arithmetic number, because the mean of its divisors is an integer number (124270248900).

Almost surely, 2^{2185736147172} is an apocalyptic number.

It is an amenable number.

2185736147172 is an abundant number, since it is smaller than the sum of its proper divisors (3779235800028).

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

2185736147172 is a wasteful number, since it uses less digits than its factorization.

2185736147172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065173593 (or 1065173585 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The spelling of 2185736147172 in words is "two trillion, one hundred eighty-five billion, seven hundred thirty-six million, one hundred forty-seven thousand, one hundred seventy-two".