2864646991 has 2 divisors, whose sum is σ = 2864646992. Its totient is φ = 2864646990.

The previous prime is 2864646973. The next prime is 2864647061. The reversal of 2864646991 is 1996464682.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2864646991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2864646391) 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 as a sum of consecutive naturals, namely, 1432323495 + 1432323496.

It is an arithmetic number, because the mean of its divisors is an integer number (1432323496).

Almost surely, 2^2864646991 is an apocalyptic number.

2864646991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2864646991 is an equidigital number, since it uses as much as digits as its factorization.

2864646991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 55.

The square root of 2864646991 is about 53522.3970969164. The cubic root of 2864646991 is about 1420.2246207850.

The spelling of 2864646991 in words is "two billion, eight hundred sixty-four million, six hundred forty-six thousand, nine hundred ninety-one".