2116123538 has 4 divisors (see below), whose sum is σ = 3174185310. Its totient is φ = 1058061768.

The previous prime is 2116123531. The next prime is 2116123549. The reversal of 2116123538 is 8353216112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2086388329 + 29735209 = 45677^2 + 5453^2 .

It is not an unprimeable number, because it can be changed into a prime (2116123531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 529030883 + ... + 529030886.

Almost surely, 2^2116123538 is an apocalyptic number.

2116123538 is a deficient number, since it is larger than the sum of its proper divisors (1058061772).

2116123538 is a wasteful number, since it uses less digits than its factorization.

2116123538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058061771.

The product of its digits is 8640, while the sum is 32.

The square root of 2116123538 is about 46001.3427847492. The cubic root of 2116123538 is about 1283.8481885098.

The spelling of 2116123538 in words is "two billion, one hundred sixteen million, one hundred twenty-three thousand, five hundred thirty-eight".