53681260981 has 2 divisors, whose sum is σ = 53681260982. Its totient is φ = 53681260980.

The previous prime is 53681260939. The next prime is 53681260999. The reversal of 53681260981 is 18906218635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44250908881 + 9430352100 = 210359^2 + 97110^2 .

It is a cyclic number.

It is not a de Polignac number, because 53681260981 - 2¹³ = 53681252789 is a prime.

It is a super-2 number, since 2×53681260981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53681260901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26840630490 + 26840630491.

It is an arithmetic number, because the mean of its divisors is an integer number (26840630491).

Almost surely, 2^53681260981 is an apocalyptic number.

It is an amenable number.

53681260981 is a deficient number, since it is larger than the sum of its proper divisors (1).

53681260981 is an equidigital number, since it uses as much as digits as its factorization.

53681260981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 53681260981 in words is "fifty-three billion, six hundred eighty-one million, two hundred sixty thousand, nine hundred eighty-one".