55755778 has 16 divisors (see below), whose sum is σ = 92163456. Its totient is φ = 25134480.

The previous prime is 55755773. The next prime is 55755787. The reversal of 55755778 is 87755755.

It is not an unprimeable number, because it can be changed into a prime (55755773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23818 + ... + 26053.

It is an arithmetic number, because the mean of its divisors is an integer number (5760216).

Almost surely, 2^55755778 is an apocalyptic number.

55755778 is a deficient number, since it is larger than the sum of its proper divisors (36407678).

55755778 is a wasteful number, since it uses less digits than its factorization.

55755778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49929.

The product of its digits is 1715000, while the sum is 49.

The square root of 55755778 is about 7466.9791750078. The cubic root of 55755778 is about 382.0292595663.

The spelling of 55755778 in words is "fifty-five million, seven hundred fifty-five thousand, seven hundred seventy-eight".