2764128491 has 2 divisors, whose sum is σ = 2764128492. Its totient is φ = 2764128490.

The previous prime is 2764128487. The next prime is 2764128517. The reversal of 2764128491 is 1948214672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2764128491 - 2² = 2764128487 is a prime.

It is not a weakly prime, because it can be changed into another prime (2764128461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382064245 + 1382064246.

It is an arithmetic number, because the mean of its divisors is an integer number (1382064246).

Almost surely, 2^2764128491 is an apocalyptic number.

2764128491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2764128491 is an equidigital number, since it uses as much as digits as its factorization.

2764128491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 2764128491 is about 52574.9797051792. The cubic root of 2764128491 is about 1403.4148764248.

The spelling of 2764128491 in words is "two billion, seven hundred sixty-four million, one hundred twenty-eight thousand, four hundred ninety-one".