2188784725 has 24 divisors (see below), whose sum is σ = 2770135200. Its totient is φ = 1714989120.

The previous prime is 2188784707. The next prime is 2188784749. The reversal of 2188784725 is 5274878812.

It is not a de Polignac number, because 2188784725 - 2⁵ = 2188784693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1041726 + ... + 1043824.

It is an arithmetic number, because the mean of its divisors is an integer number (115422300).

Almost surely, 2^2188784725 is an apocalyptic number.

2188784725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2188784725 is a deficient number, since it is larger than the sum of its proper divisors (581350475).

2188784725 is a wasteful number, since it uses less digits than its factorization.

2188784725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949 (or 2944 counting only the distinct ones).

The product of its digits is 2007040, while the sum is 52.

The square root of 2188784725 is about 46784.4496066802. The cubic root of 2188784725 is about 1298.3776062803.

The spelling of 2188784725 in words is "two billion, one hundred eighty-eight million, seven hundred eighty-four thousand, seven hundred twenty-five".