54940895921 has 2 divisors, whose sum is σ = 54940895922. Its totient is φ = 54940895920.

The previous prime is 54940895861. The next prime is 54940895927. The reversal of 54940895921 is 12959804945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52458863521 + 2482032400 = 229039^2 + 49820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54940895921 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (54940895927) 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, 27470447960 + 27470447961.

It is an arithmetic number, because the mean of its divisors is an integer number (27470447961).

Almost surely, 2^54940895921 is an apocalyptic number.

It is an amenable number.

54940895921 is a deficient number, since it is larger than the sum of its proper divisors (1).

54940895921 is an equidigital number, since it uses as much as digits as its factorization.

54940895921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 54940895921 in words is "fifty-four billion, nine hundred forty million, eight hundred ninety-five thousand, nine hundred twenty-one".