2116659537 has 12 divisors (see below), whose sum is σ = 3062560644. Its totient is φ = 1408723200.

The previous prime is 2116659521. The next prime is 2116659541. The reversal of 2116659537 is 7359566112.

2116659537 is a `hidden beast` number, since 2 + 1 + 1 + 66 + 59 + 537 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1682312256 + 434347281 = 41016^2 + 20841^2 .

It is not a de Polignac number, because 2116659537 - 2⁴ = 2116659521 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2116659492 and 2116659501.

It is not an unprimeable number, because it can be changed into a prime (2116659437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192964 + ... + 203637.

It is an arithmetic number, because the mean of its divisors is an integer number (255213387).

Almost surely, 2^2116659537 is an apocalyptic number.

It is an amenable number.

2116659537 is a deficient number, since it is larger than the sum of its proper divisors (945901107).

2116659537 is a wasteful number, since it uses less digits than its factorization.

2116659537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397200 (or 397197 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 2116659537 is about 46007.1683219039. The cubic root of 2116659537 is about 1283.9565758890.

The spelling of 2116659537 in words is "two billion, one hundred sixteen million, six hundred fifty-nine thousand, five hundred thirty-seven".