5161220650 has 24 divisors (see below), whose sum is σ = 9859329900. Its totient is φ = 2008690560.

The previous prime is 5161220639. The next prime is 5161220663. The reversal of 5161220650 is 560221615.

It can be written as a sum of positive squares in 6 ways, for example, as 1605364489 + 3555856161 = 40067^2 + 59631^2 .

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 1393075 + ... + 1396774.

Almost surely, 2^5161220650 is an apocalyptic number.

5161220650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

5161220650 is a deficient number, since it is larger than the sum of its proper divisors (4698109250).

5161220650 is a wasteful number, since it uses less digits than its factorization.

5161220650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789898 (or 2789893 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 5161220650 is about 71841.6359084340. The cubic root of 5161220650 is about 1728.1607693372.

The spelling of 5161220650 in words is "five billion, one hundred sixty-one million, two hundred twenty thousand, six hundred fifty".