5991178009 has 2 divisors, whose sum is σ = 5991178010. Its totient is φ = 5991178008.

The previous prime is 5991178007. The next prime is 5991178043. The reversal of 5991178009 is 9008711995.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4499055625 + 1492122384 = 67075^2 + 38628^2 .

It is a cyclic number.

It is not a de Polignac number, because 5991178009 - 2¹ = 5991178007 is a prime.

Together with 5991178007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5991178001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2995589004 + 2995589005.

It is an arithmetic number, because the mean of its divisors is an integer number (2995589005).

Almost surely, 2^5991178009 is an apocalyptic number.

It is an amenable number.

5991178009 is a deficient number, since it is larger than the sum of its proper divisors (1).

5991178009 is an equidigital number, since it uses as much as digits as its factorization.

5991178009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 49.

The square root of 5991178009 is about 77402.7002694350. The cubic root of 5991178009 is about 1816.2295659034.

The spelling of 5991178009 in words is "five billion, nine hundred ninety-one million, one hundred seventy-eight thousand, nine".