55678543999 has 8 divisors (see below), whose sum is σ = 60035638320. Its totient is φ = 51332039616.

The previous prime is 55678543993. The next prime is 55678544011. The reversal of 55678543999 is 99934587655.

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

It is not a de Polignac number, because 55678543999 - 2²⁵ = 55644989567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55678543993) 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, 2636557 + ... + 2657590.

It is an arithmetic number, because the mean of its divisors is an integer number (7504454790).

Almost surely, 2^55678543999 is an apocalyptic number.

55678543999 is a deficient number, since it is larger than the sum of its proper divisors (4357094321).

55678543999 is a wasteful number, since it uses less digits than its factorization.

55678543999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5294969.

The product of its digits is 367416000, while the sum is 70.

The spelling of 55678543999 in words is "fifty-five billion, six hundred seventy-eight million, five hundred forty-three thousand, nine hundred ninety-nine".