54985438091 has 2 divisors, whose sum is σ = 54985438092. Its totient is φ = 54985438090.

The previous prime is 54985438063. The next prime is 54985438159. The reversal of 54985438091 is 19083458945.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54985438091 is a prime.

It is not a weakly prime, because it can be changed into another prime (54985438021) 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, 27492719045 + 27492719046.

It is an arithmetic number, because the mean of its divisors is an integer number (27492719046).

Almost surely, 2^54985438091 is an apocalyptic number.

54985438091 is a deficient number, since it is larger than the sum of its proper divisors (1).

54985438091 is an equidigital number, since it uses as much as digits as its factorization.

54985438091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 54985438091 in words is "fifty-four billion, nine hundred eighty-five million, four hundred thirty-eight thousand, ninety-one".