54778541117 has 2 divisors, whose sum is σ = 54778541118. Its totient is φ = 54778541116.

The previous prime is 54778541099. The next prime is 54778541137. The reversal of 54778541117 is 71114587745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28795035481 + 25983505636 = 169691^2 + 161194^2 .

It is a cyclic number.

It is not a de Polignac number, because 54778541117 - 2⁶ = 54778541053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54778541137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27389270558 + 27389270559.

It is an arithmetic number, because the mean of its divisors is an integer number (27389270559).

Almost surely, 2^54778541117 is an apocalyptic number.

It is an amenable number.

54778541117 is a deficient number, since it is larger than the sum of its proper divisors (1).

54778541117 is an equidigital number, since it uses as much as digits as its factorization.

54778541117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1097600, while the sum is 50.

The spelling of 54778541117 in words is "fifty-four billion, seven hundred seventy-eight million, five hundred forty-one thousand, one hundred seventeen".