54887713781 has 2 divisors, whose sum is σ = 54887713782. Its totient is φ = 54887713780.

The previous prime is 54887713729. The next prime is 54887713787. The reversal of 54887713781 is 18731778845.

It is a happy number.

54887713781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50945004100 + 3942709681 = 225710^2 + 62791^2 .

It is a cyclic number.

It is not a de Polignac number, because 54887713781 - 2⁶ = 54887713717 is a prime.

It is a super-2 number, since 2×54887713781² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 54887713781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54887713787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27443856890 + 27443856891.

It is an arithmetic number, because the mean of its divisors is an integer number (27443856891).

Almost surely, 2^54887713781 is an apocalyptic number.

It is an amenable number.

54887713781 is a deficient number, since it is larger than the sum of its proper divisors (1).

54887713781 is an equidigital number, since it uses as much as digits as its factorization.

54887713781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10536960, while the sum is 59.

The spelling of 54887713781 in words is "fifty-four billion, eight hundred eighty-seven million, seven hundred thirteen thousand, seven hundred eighty-one".