2061854647 has 2 divisors, whose sum is σ = 2061854648. Its totient is φ = 2061854646.

The previous prime is 2061854623. The next prime is 2061854677. The reversal of 2061854647 is 7464581602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061854647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061854677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030927323 + 1030927324.

It is an arithmetic number, because the mean of its divisors is an integer number (1030927324).

Almost surely, 2^2061854647 is an apocalyptic number.

2061854647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061854647 is an equidigital number, since it uses as much as digits as its factorization.

2061854647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 2061854647 is about 45407.6496528944. The cubic root of 2061854647 is about 1272.7780646330.

The spelling of 2061854647 in words is "two billion, sixty-one million, eight hundred fifty-four thousand, six hundred forty-seven".