55278891943 has 8 divisors (see below), whose sum is σ = 60665351040. Its totient is φ = 49952617080.

The previous prime is 55278891929. The next prime is 55278891947. The reversal of 55278891943 is 34919887255.

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

It is a cyclic number.

It is not a de Polignac number, because 55278891943 - 2²⁹ = 54742021031 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 (55278891947) 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, 15044133 + ... + 15047806.

It is an arithmetic number, because the mean of its divisors is an integer number (7583168880).

Almost surely, 2^55278891943 is an apocalyptic number.

55278891943 is a deficient number, since it is larger than the sum of its proper divisors (5386459097).

55278891943 is a wasteful number, since it uses less digits than its factorization.

55278891943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30092117.

The product of its digits is 21772800, while the sum is 61.

The spelling of 55278891943 in words is "fifty-five billion, two hundred seventy-eight million, eight hundred ninety-one thousand, nine hundred forty-three".