54842987857 has 4 divisors (see below), whose sum is σ = 62677700416. Its totient is φ = 47008275300.

The previous prime is 54842987851. The next prime is 54842987861. The reversal of 54842987857 is 75878924845.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75878924845 = 5 ⋅15175784969.

It is a de Polignac number, because none of the positive numbers 2^k-54842987857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54842987792 and 54842987801.

It is not an unprimeable number, because it can be changed into a prime (54842987851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3917356269 + ... + 3917356282.

It is an arithmetic number, because the mean of its divisors is an integer number (15669425104).

Almost surely, 2^54842987857 is an apocalyptic number.

It is an amenable number.

54842987857 is a deficient number, since it is larger than the sum of its proper divisors (7834712559).

54842987857 is an equidigital number, since it uses as much as digits as its factorization.

54842987857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7834712558.

The product of its digits is 180633600, while the sum is 67.

The spelling of 54842987857 in words is "fifty-four billion, eight hundred forty-two million, nine hundred eighty-seven thousand, eight hundred fifty-seven".