54696871921 has 2 divisors, whose sum is σ = 54696871922. Its totient is φ = 54696871920.

The previous prime is 54696871897. The next prime is 54696871961. The reversal of 54696871921 is 12917869645.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45488358400 + 9208513521 = 213280^2 + 95961^2 .

It is a cyclic number.

It is not a de Polignac number, because 54696871921 - 2⁷ = 54696871793 is a prime.

It is not a weakly prime, because it can be changed into another prime (54696871961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27348435960 + 27348435961.

It is an arithmetic number, because the mean of its divisors is an integer number (27348435961).

Almost surely, 2^54696871921 is an apocalyptic number.

It is an amenable number.

54696871921 is a deficient number, since it is larger than the sum of its proper divisors (1).

54696871921 is an equidigital number, since it uses as much as digits as its factorization.

54696871921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 58.

The spelling of 54696871921 in words is "fifty-four billion, six hundred ninety-six million, eight hundred seventy-one thousand, nine hundred twenty-one".