54363267781 has 2 divisors, whose sum is σ = 54363267782. Its totient is φ = 54363267780.

The previous prime is 54363267779. The next prime is 54363267863. The reversal of 54363267781 is 18776236345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46207371681 + 8155896100 = 214959^2 + 90310^2 .

It is a cyclic number.

It is not a de Polignac number, because 54363267781 - 2¹ = 54363267779 is a prime.

It is a super-2 number, since 2×54363267781² (a number of 22 digits) contains 22 as substring.

Together with 54363267779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54363267181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27181633890 + 27181633891.

It is an arithmetic number, because the mean of its divisors is an integer number (27181633891).

Almost surely, 2^54363267781 is an apocalyptic number.

It is an amenable number.

54363267781 is a deficient number, since it is larger than the sum of its proper divisors (1).

54363267781 is an equidigital number, since it uses as much as digits as its factorization.

54363267781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 52.

The spelling of 54363267781 in words is "fifty-four billion, three hundred sixty-three million, two hundred sixty-seven thousand, seven hundred eighty-one".