54658685581 has 2 divisors, whose sum is σ = 54658685582. Its totient is φ = 54658685580.

The previous prime is 54658685567. The next prime is 54658685591. The reversal of 54658685581 is 18558685645.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53284797225 + 1373888356 = 230835^2 + 37066^2 .

It is a cyclic number.

It is not a de Polignac number, because 54658685581 - 2²⁷ = 54524467853 is a prime.

It is a super-2 number, since 2×54658685581² (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 (54658685551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27329342790 + 27329342791.

It is an arithmetic number, because the mean of its divisors is an integer number (27329342791).

Almost surely, 2^54658685581 is an apocalyptic number.

It is an amenable number.

54658685581 is a deficient number, since it is larger than the sum of its proper divisors (1).

54658685581 is an equidigital number, since it uses as much as digits as its factorization.

54658685581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080000, while the sum is 61.

The spelling of 54658685581 in words is "fifty-four billion, six hundred fifty-eight million, six hundred eighty-five thousand, five hundred eighty-one".