2188747485 has 48 divisors (see below), whose sum is σ = 3952428480. Its totient is φ = 1119502080.

The previous prime is 2188747409. The next prime is 2188747499. The reversal of 2188747485 is 5847478812.

2188747485 is a `hidden beast` number, since 2 + 18 + 87 + 474 + 85 = 666.

2188747485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2188747485 - 2²³ = 2180358877 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98802 + ... + 118908.

It is an arithmetic number, because the mean of its divisors is an integer number (82342260).

Almost surely, 2^2188747485 is an apocalyptic number.

It is an amenable number.

2188747485 is a deficient number, since it is larger than the sum of its proper divisors (1763680995).

2188747485 is a wasteful number, since it uses less digits than its factorization.

2188747485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20218 (or 20215 counting only the distinct ones).

The product of its digits is 4014080, while the sum is 54.

The square root of 2188747485 is about 46784.0516094962. The cubic root of 2188747485 is about 1298.3702427030.

The spelling of 2188747485 in words is "two billion, one hundred eighty-eight million, seven hundred forty-seven thousand, four hundred eighty-five".