55055054918978 has 32 divisors (see below), whose sum is σ = 84333551283072. Its totient is φ = 26949759782400.

The previous prime is 55055054918933. The next prime is 55055054918987. The reversal of 55055054918978 is 87981945055055.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15706025 + ... + 18888867.

It is an arithmetic number, because the mean of its divisors is an integer number (2635423477596).

Almost surely, 2^{55055054918978} is an apocalyptic number.

55055054918978 is a deficient number, since it is larger than the sum of its proper divisors (29278496364094).

55055054918978 is a wasteful number, since it uses less digits than its factorization.

55055054918978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183770.

The product of its (nonzero) digits is 453600000, while the sum is 71.

The spelling of 55055054918978 in words is "fifty-five trillion, fifty-five billion, fifty-four million, nine hundred eighteen thousand, nine hundred seventy-eight".