55519078423 has 4 divisors (see below), whose sum is σ = 55521992088. Its totient is φ = 55516164760.

The previous prime is 55519078369. The next prime is 55519078441. The reversal of 55519078423 is 32487091555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55519078423 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 (55519078453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428061 + ... + 1466422.

It is an arithmetic number, because the mean of its divisors is an integer number (13880498022).

Almost surely, 2^55519078423 is an apocalyptic number.

55519078423 is a deficient number, since it is larger than the sum of its proper divisors (2913665).

55519078423 is a wasteful number, since it uses less digits than its factorization.

55519078423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913664.

The product of its (nonzero) digits is 1512000, while the sum is 49.

The spelling of 55519078423 in words is "fifty-five billion, five hundred nineteen million, seventy-eight thousand, four hundred twenty-three".