55378056 has 16 divisors (see below), whose sum is σ = 138445200. Its totient is φ = 18459344.

The previous prime is 55378051. The next prime is 55378087. The reversal of 55378056 is 65087355.

It is not an unprimeable number, because it can be changed into a prime (55378051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153686 + ... + 1153733.

It is an arithmetic number, because the mean of its divisors is an integer number (8652825).

Almost surely, 2^55378056 is an apocalyptic number.

It is an amenable number.

55378056 is an abundant number, since it is smaller than the sum of its proper divisors (83067144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55378056 is a wasteful number, since it uses less digits than its factorization.

55378056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307428 (or 2307424 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 55378056 is about 7441.6433668915. The cubic root of 55378056 is about 381.1646080904.

The spelling of 55378056 in words is "fifty-five million, three hundred seventy-eight thousand, fifty-six".