55378755 has 32 divisors (see below), whose sum is σ = 99489600. Its totient is φ = 29223936.

The previous prime is 55378753. The next prime is 55378769. The reversal of 55378755 is 55787355.

It is not a de Polignac number, because 55378755 - 2¹ = 55378753 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55378755.

It is not an unprimeable number, because it can be changed into a prime (55378753) 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 31 ways as a sum of consecutive naturals, for example, 10981 + ... + 15209.

It is an arithmetic number, because the mean of its divisors is an integer number (3109050).

Almost surely, 2^55378755 is an apocalyptic number.

55378755 is a deficient number, since it is larger than the sum of its proper divisors (44110845).

55378755 is a wasteful number, since it uses less digits than its factorization.

55378755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4340 (or 4334 counting only the distinct ones).

The product of its digits is 735000, while the sum is 45.

The square root of 55378755 is about 7441.6903321759. The cubic root of 55378755 is about 381.1662118119.

The spelling of 55378755 in words is "fifty-five million, three hundred seventy-eight thousand, seven hundred fifty-five".