5651991211 has 2 divisors, whose sum is σ = 5651991212. Its totient is φ = 5651991210.

The previous prime is 5651991167. The next prime is 5651991263. The reversal of 5651991211 is 1121991565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5651991211 - 2²³ = 5643602603 is a prime.

It is not a weakly prime, because it can be changed into another prime (5651991811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2825995605 + 2825995606.

It is an arithmetic number, because the mean of its divisors is an integer number (2825995606).

Almost surely, 2^5651991211 is an apocalyptic number.

5651991211 is a deficient number, since it is larger than the sum of its proper divisors (1).

5651991211 is an equidigital number, since it uses as much as digits as its factorization.

5651991211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 40.

The square root of 5651991211 is about 75179.7260636137. The cubic root of 5651991211 is about 1781.2867028514.

The spelling of 5651991211 in words is "five billion, six hundred fifty-one million, nine hundred ninety-one thousand, two hundred eleven".