2047640851 has 2 divisors, whose sum is σ = 2047640852. Its totient is φ = 2047640850.

The previous prime is 2047640807. The next prime is 2047640897. The reversal of 2047640851 is 1580467402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2047640851 - 2⁹ = 2047640339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2047640851.

It is not a weakly prime, because it can be changed into another prime (2047640351) 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, 1023820425 + 1023820426.

It is an arithmetic number, because the mean of its divisors is an integer number (1023820426).

Almost surely, 2^2047640851 is an apocalyptic number.

2047640851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2047640851 is an equidigital number, since it uses as much as digits as its factorization.

2047640851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 2047640851 is about 45250.8657486241. The cubic root of 2047640851 is about 1269.8466037061.

The spelling of 2047640851 in words is "two billion, forty-seven million, six hundred forty thousand, eight hundred fifty-one".