2053680781 has 2 divisors, whose sum is σ = 2053680782. Its totient is φ = 2053680780.

The previous prime is 2053680763. The next prime is 2053680793. The reversal of 2053680781 is 1870863502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1262665156 + 791015625 = 35534^2 + 28125^2 .

It is a cyclic number.

It is not a de Polignac number, because 2053680781 - 2²¹ = 2051583629 is a prime.

It is a super-2 number, since 2×2053680781² = 8435209500497539922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2053680701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026840390 + 1026840391.

It is an arithmetic number, because the mean of its divisors is an integer number (1026840391).

Almost surely, 2^2053680781 is an apocalyptic number.

It is an amenable number.

2053680781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2053680781 is an equidigital number, since it uses as much as digits as its factorization.

2053680781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2053680781 is about 45317.5548877033. The cubic root of 2053680781 is about 1271.0939343817.

The spelling of 2053680781 in words is "two billion, fifty-three million, six hundred eighty thousand, seven hundred eighty-one".