5001550991 has 2 divisors, whose sum is σ = 5001550992. Its totient is φ = 5001550990.

The previous prime is 5001550987. The next prime is 5001551017. The reversal of 5001550991 is 1990551005.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5001550991 - 2² = 5001550987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5001550091) by changing a digit.

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 as a sum of consecutive naturals, namely, 2500775495 + 2500775496.

It is an arithmetic number, because the mean of its divisors is an integer number (2500775496).

Almost surely, 2^5001550991 is an apocalyptic number.

5001550991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5001550991 is an equidigital number, since it uses as much as digits as its factorization.

5001550991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10125, while the sum is 35.

The square root of 5001550991 is about 70721.6444308247. The cubic root of 5001550991 is about 1710.1527388846.

The spelling of 5001550991 in words is "five billion, one million, five hundred fifty thousand, nine hundred ninety-one".