54305727661 has 2 divisors, whose sum is σ = 54305727662. Its totient is φ = 54305727660.

The previous prime is 54305727617. The next prime is 54305727689. The reversal of 54305727661 is 16672750345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50990156100 + 3315571561 = 225810^2 + 57581^2 .

It is a cyclic number.

It is not a de Polignac number, because 54305727661 - 2⁷ = 54305727533 is a prime.

It is a super-2 number, since 2×54305727661² (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 (54305727601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27152863830 + 27152863831.

It is an arithmetic number, because the mean of its divisors is an integer number (27152863831).

Almost surely, 2^54305727661 is an apocalyptic number.

It is an amenable number.

54305727661 is a deficient number, since it is larger than the sum of its proper divisors (1).

54305727661 is an equidigital number, since it uses as much as digits as its factorization.

54305727661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 54305727661 in words is "fifty-four billion, three hundred five million, seven hundred twenty-seven thousand, six hundred sixty-one".