2117172650 has 24 divisors (see below), whose sum is σ = 3939437964. Its totient is φ = 846547200.

The previous prime is 2117172649. The next prime is 2117172653. The reversal of 2117172650 is 562717112.

It can be written as a sum of positive squares in 6 ways, for example, as 1538914441 + 578258209 = 39229^2 + 24047^2 .

It is not an unprimeable number, because it can be changed into a prime (2117172653) 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 in 11 ways as a sum of consecutive naturals, for example, 159260 + ... + 172040.

Almost surely, 2^2117172650 is an apocalyptic number.

2117172650 is a deficient number, since it is larger than the sum of its proper divisors (1822265314).

2117172650 is a wasteful number, since it uses less digits than its factorization.

2117172650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16106 (or 16101 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 2117172650 is about 46012.7444302119. The cubic root of 2117172650 is about 1284.0603182198.

Adding to 2117172650 its reverse (562717112), we get a palindrome (2679889762).

The spelling of 2117172650 in words is "two billion, one hundred seventeen million, one hundred seventy-two thousand, six hundred fifty".