55378485631369 has 2 divisors, whose sum is σ = 55378485631370. Its totient is φ = 55378485631368.

The previous prime is 55378485631361. The next prime is 55378485631387. The reversal of 55378485631369 is 96313658487355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53963539696144 + 1414945935225 = 7345988^2 + 1189515^2 .

It is a cyclic number.

It is not a de Polignac number, because 55378485631369 - 2³ = 55378485631361 is a prime.

It is a super-2 number, since 2×55378485631369² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55378485631361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27689242815684 + 27689242815685.

It is an arithmetic number, because the mean of its divisors is an integer number (27689242815685).

Almost surely, 2^{55378485631369} is an apocalyptic number.

It is an amenable number.

55378485631369 is a deficient number, since it is larger than the sum of its proper divisors (1).

55378485631369 is an equidigital number, since it uses as much as digits as its factorization.

55378485631369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552000, while the sum is 73.

The spelling of 55378485631369 in words is "fifty-five trillion, three hundred seventy-eight billion, four hundred eighty-five million, six hundred thirty-one thousand, three hundred sixty-nine".