54891963839 has 2 divisors, whose sum is σ = 54891963840. Its totient is φ = 54891963838.

The previous prime is 54891963823. The next prime is 54891963869. The reversal of 54891963839 is 93836919845.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54891963839 - 2⁴ = 54891963823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54891963869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27445981919 + 27445981920.

It is an arithmetic number, because the mean of its divisors is an integer number (27445981920).

Almost surely, 2^54891963839 is an apocalyptic number.

54891963839 is a deficient number, since it is larger than the sum of its proper divisors (1).

54891963839 is an equidigital number, since it uses as much as digits as its factorization.

54891963839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50388480, while the sum is 65.

The spelling of 54891963839 in words is "fifty-four billion, eight hundred ninety-one million, nine hundred sixty-three thousand, eight hundred thirty-nine".