55319039917 has 2 divisors, whose sum is σ = 55319039918. Its totient is φ = 55319039916.

The previous prime is 55319039887. The next prime is 55319039953. The reversal of 55319039917 is 71993091355.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31304578761 + 24014461156 = 176931^2 + 154966^2 .

It is a cyclic number.

It is not a de Polignac number, because 55319039917 - 2³⁵ = 20959301549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55319069917) 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, 27659519958 + 27659519959.

It is an arithmetic number, because the mean of its divisors is an integer number (27659519959).

Almost surely, 2^55319039917 is an apocalyptic number.

It is an amenable number.

55319039917 is a deficient number, since it is larger than the sum of its proper divisors (1).

55319039917 is an equidigital number, since it uses as much as digits as its factorization.

55319039917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1148175, while the sum is 52.

The spelling of 55319039917 in words is "fifty-five billion, three hundred nineteen million, thirty-nine thousand, nine hundred seventeen".