55508903890369 has 2 divisors, whose sum is σ = 55508903890370. Its totient is φ = 55508903890368.

The previous prime is 55508903890361. The next prime is 55508903890469. The reversal of 55508903890369 is 96309830980555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53144274960144 + 2364628930225 = 7290012^2 + 1537735^2 .

It is a cyclic number.

It is not a de Polignac number, because 55508903890369 - 2³ = 55508903890361 is a prime.

It is a super-2 number, since 2×55508903890369² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55508903890298 and 55508903890307.

It is not a weakly prime, because it can be changed into another prime (55508903890361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27754451945184 + 27754451945185.

It is an arithmetic number, because the mean of its divisors is an integer number (27754451945185).

Almost surely, 2^{55508903890369} is an apocalyptic number.

It is an amenable number.

55508903890369 is a deficient number, since it is larger than the sum of its proper divisors (1).

55508903890369 is an equidigital number, since it uses as much as digits as its factorization.

55508903890369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928000, while the sum is 70.

The spelling of 55508903890369 in words is "fifty-five trillion, five hundred eight billion, nine hundred three million, eight hundred ninety thousand, three hundred sixty-nine".