2188486855946 has 32 divisors (see below), whose sum is σ = 3659013544320. Its totient is φ = 975607372800.

The previous prime is 2188486855879. The next prime is 2188486855949. The reversal of 2188486855946 is 6495586848812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2188486855949) 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, 10380866 + ... + 10589586.

It is an arithmetic number, because the mean of its divisors is an integer number (114344173260).

Almost surely, 2^{2188486855946} is an apocalyptic number.

2188486855946 is a deficient number, since it is larger than the sum of its proper divisors (1470526688374).

2188486855946 is a wasteful number, since it uses less digits than its factorization.

2188486855946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224990.

The product of its digits is 1061683200, while the sum is 74.

The spelling of 2188486855946 in words is "two trillion, one hundred eighty-eight billion, four hundred eighty-six million, eight hundred fifty-five thousand, nine hundred forty-six".