55678569091 has 2 divisors, whose sum is σ = 55678569092. Its totient is φ = 55678569090.

The previous prime is 55678569083. The next prime is 55678569101. The reversal of 55678569091 is 19096587655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55678569091 - 2³ = 55678569083 is a prime.

It is not a weakly prime, because it can be changed into another prime (55678569071) 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, 27839284545 + 27839284546.

It is an arithmetic number, because the mean of its divisors is an integer number (27839284546).

Almost surely, 2^55678569091 is an apocalyptic number.

55678569091 is a deficient number, since it is larger than the sum of its proper divisors (1).

55678569091 is an equidigital number, since it uses as much as digits as its factorization.

55678569091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412000, while the sum is 61.

The spelling of 55678569091 in words is "fifty-five billion, six hundred seventy-eight million, five hundred sixty-nine thousand, ninety-one".