55378485 has 28 divisors (see below), whose sum is σ = 99642252. Its totient is φ = 29533248.

The previous prime is 55378471. The next prime is 55378489. The reversal of 55378485 is 58487355.

It can be written as a sum of positive squares in 2 ways, for example, as 41293476 + 14085009 = 6426^2 + 3753^2 .

It is not a de Polignac number, because 55378485 - 2⁸ = 55378229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 55378485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55378489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3952 + ... + 11241.

Almost surely, 2^55378485 is an apocalyptic number.

It is an amenable number.

55378485 is a deficient number, since it is larger than the sum of its proper divisors (44263767).

55378485 is an equidigital number, since it uses as much as digits as its factorization.

55378485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15216 (or 15201 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 55378485 is about 7441.6721911140. The cubic root of 55378485 is about 381.1655923502.

The spelling of 55378485 in words is "fifty-five million, three hundred seventy-eight thousand, four hundred eighty-five".