54642883861 has 2 divisors, whose sum is σ = 54642883862. Its totient is φ = 54642883860.

The previous prime is 54642883819. The next prime is 54642883871. The reversal of 54642883861 is 16838824645.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34023647025 + 20619236836 = 184455^2 + 143594^2 .

It is a cyclic number.

It is not a de Polignac number, because 54642883861 - 2⁹ = 54642883349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54642883871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27321441930 + 27321441931.

It is an arithmetic number, because the mean of its divisors is an integer number (27321441931).

Almost surely, 2^54642883861 is an apocalyptic number.

It is an amenable number.

54642883861 is a deficient number, since it is larger than the sum of its proper divisors (1).

54642883861 is an equidigital number, since it uses as much as digits as its factorization.

54642883861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8847360, while the sum is 55.

The spelling of 54642883861 in words is "fifty-four billion, six hundred forty-two million, eight hundred eighty-three thousand, eight hundred sixty-one".