2189478749812 has 24 divisors (see below), whose sum is σ = 4088920034304. Its totient is φ = 1022230000512.

The previous prime is 2189478749803. The next prime is 2189478749831.

2189478749812 is nontrivially palindromic in base 10.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126755998 + ... + 126773269.

It is an arithmetic number, because the mean of its divisors is an integer number (170371668096).

Almost surely, 2^{2189478749812} is an apocalyptic number.

It is an amenable number.

2189478749812 is a deficient number, since it is larger than the sum of its proper divisors (1899441284492).

2189478749812 is a wasteful number, since it uses less digits than its factorization.

2189478749812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253529415 (or 253529413 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 70.

The spelling of 2189478749812 in words is "two trillion, one hundred eighty-nine billion, four hundred seventy-eight million, seven hundred forty-nine thousand, eight hundred twelve".