55556278 has 8 divisors (see below), whose sum is σ = 86022720. Its totient is φ = 26882040.

The previous prime is 55556273. The next prime is 55556279. The reversal of 55556278 is 87265555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55556273) 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, 447973 + ... + 448096.

It is an arithmetic number, because the mean of its divisors is an integer number (10752840).

Almost surely, 2^55556278 is an apocalyptic number.

55556278 is a deficient number, since it is larger than the sum of its proper divisors (30466442).

55556278 is a wasteful number, since it uses less digits than its factorization.

55556278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896102.

The product of its digits is 420000, while the sum is 43.

The square root of 55556278 is about 7453.6083878884. The cubic root of 55556278 is about 381.5730681622.

The spelling of 55556278 in words is "fifty-five million, five hundred fifty-six thousand, two hundred seventy-eight".