2116615537 has 2 divisors, whose sum is σ = 2116615538. Its totient is φ = 2116615536.

The previous prime is 2116615513. The next prime is 2116615591. The reversal of 2116615537 is 7355166112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2035453456 + 81162081 = 45116^2 + 9009^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116615537 - 2¹¹ = 2116613489 is a prime.

It is a super-2 number, since 2×2116615537² = 8960122662939596738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2116615496 and 2116615505.

It is not a weakly prime, because it can be changed into another prime (2116615507) by changing a digit.

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 as a sum of consecutive naturals, namely, 1058307768 + 1058307769.

It is an arithmetic number, because the mean of its divisors is an integer number (1058307769).

Almost surely, 2^2116615537 is an apocalyptic number.

It is an amenable number.

2116615537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116615537 is an equidigital number, since it uses as much as digits as its factorization.

2116615537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 2116615537 is about 46006.6901330665. The cubic root of 2116615537 is about 1283.9476790904.

The spelling of 2116615537 in words is "two billion, one hundred sixteen million, six hundred fifteen thousand, five hundred thirty-seven".