53800081681 has 2 divisors, whose sum is σ = 53800081682. Its totient is φ = 53800081680.

The previous prime is 53800081651. The next prime is 53800081691. The reversal of 53800081681 is 18618000835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53610771600 + 189310081 = 231540^2 + 13759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53800081681 is a prime.

It is a super-2 number, since 2×53800081681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53800081651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26900040840 + 26900040841.

It is an arithmetic number, because the mean of its divisors is an integer number (26900040841).

Almost surely, 2^53800081681 is an apocalyptic number.

It is an amenable number.

53800081681 is a deficient number, since it is larger than the sum of its proper divisors (1).

53800081681 is an equidigital number, since it uses as much as digits as its factorization.

53800081681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 40.

The spelling of 53800081681 in words is "fifty-three billion, eight hundred million, eighty-one thousand, six hundred eighty-one".