54778813285 has 16 divisors (see below), whose sum is σ = 76658400000. Its totient is φ = 37562613648.

The previous prime is 54778813277. The next prime is 54778813291. The reversal of 54778813285 is 58231887745.

It is not a de Polignac number, because 54778813285 - 2³ = 54778813277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15968785 + ... + 15972214.

It is an arithmetic number, because the mean of its divisors is an integer number (4791150000).

Almost surely, 2^54778813285 is an apocalyptic number.

It is an amenable number.

54778813285 is a deficient number, since it is larger than the sum of its proper divisors (21879586715).

54778813285 is an equidigital number, since it uses as much as digits as its factorization.

54778813285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31941025 (or 31941011 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 58.

The spelling of 54778813285 in words is "fifty-four billion, seven hundred seventy-eight million, eight hundred thirteen thousand, two hundred eighty-five".