2155189196816 has 40 divisors (see below), whose sum is σ = 4218964620024. Its totient is φ = 1066425384960.

The previous prime is 2155189196803. The next prime is 2155189196837. The reversal of 2155189196816 is 6186919815512.

It can be written as a sum of positive squares in 4 ways, for example, as 833379106816 + 1321810090000 = 912896^2 + 1149700^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42438896 + ... + 42489648.

Almost surely, 2^{2155189196816} is an apocalyptic number.

It is an amenable number.

2155189196816 is a deficient number, since it is larger than the sum of its proper divisors (2063775423208).

2155189196816 is a wasteful number, since it uses less digits than its factorization.

2155189196816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78219 (or 78213 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 62.

The spelling of 2155189196816 in words is "two trillion, one hundred fifty-five billion, one hundred eighty-nine million, one hundred ninety-six thousand, eight hundred sixteen".