55555255278 has 12 divisors (see below), whose sum is σ = 120369719808. Its totient is φ = 18518418420.

The previous prime is 55555255277. The next prime is 55555255291. The reversal of 55555255278 is 87255255555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555255271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1543201518 + ... + 1543201553.

It is an arithmetic number, because the mean of its divisors is an integer number (10030809984).

Almost surely, 2^55555255278 is an apocalyptic number.

55555255278 is an abundant number, since it is smaller than the sum of its proper divisors (64814464530).

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

55555255278 is a wasteful number, since it uses less digits than its factorization.

55555255278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086403079 (or 3086403076 counting only the distinct ones).

The product of its digits is 17500000, while the sum is 54.

The spelling of 55555255278 in words is "fifty-five billion, five hundred fifty-five million, two hundred fifty-five thousand, two hundred seventy-eight".