2127156617 has 2 divisors, whose sum is σ = 2127156618. Its totient is φ = 2127156616.

The previous prime is 2127156613. The next prime is 2127156649. The reversal of 2127156617 is 7166517212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1455880336 + 671276281 = 38156^2 + 25909^2 .

It is a cyclic number.

It is not a de Polignac number, because 2127156617 - 2² = 2127156613 is a prime.

It is not a weakly prime, because it can be changed into another prime (2127156611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063578308 + 1063578309.

It is an arithmetic number, because the mean of its divisors is an integer number (1063578309).

Almost surely, 2^2127156617 is an apocalyptic number.

It is an amenable number.

2127156617 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127156617 is an equidigital number, since it uses as much as digits as its factorization.

2127156617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 2127156617 is about 46121.1081501735. The cubic root of 2127156617 is about 1286.0755713857.

The spelling of 2127156617 in words is "two billion, one hundred twenty-seven million, one hundred fifty-six thousand, six hundred seventeen".