55019478939 has 8 divisors (see below), whose sum is σ = 73390125072. Its totient is φ = 36664242720.

The previous prime is 55019478781. The next prime is 55019478947. The reversal of 55019478939 is 93987491055.

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

It is not a de Polignac number, because 55019478939 - 2⁹ = 55019478427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55019478539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3844144 + ... + 3858429.

It is an arithmetic number, because the mean of its divisors is an integer number (9173765634).

Almost surely, 2^55019478939 is an apocalyptic number.

55019478939 is a deficient number, since it is larger than the sum of its proper divisors (18370646133).

55019478939 is a wasteful number, since it uses less digits than its factorization.

55019478939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7704957.

The product of its (nonzero) digits is 12247200, while the sum is 60.

The spelling of 55019478939 in words is "fifty-five billion, nineteen million, four hundred seventy-eight thousand, nine hundred thirty-nine".