504988778385 has 48 divisors (see below), whose sum is σ = 1077309402624. Its totient is φ = 213094164096.

The previous prime is 504988778353. The next prime is 504988778387. The reversal of 504988778385 is 583877889405.

504988778385 is a `hidden beast` number, since 50 + 498 + 8 + 7 + 7 + 8 + 3 + 85 = 666.

It is not a de Polignac number, because 504988778385 - 2⁵ = 504988778353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (504988778387) 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 47 ways as a sum of consecutive naturals, for example, 61655097 + ... + 61663286.

It is an arithmetic number, because the mean of its divisors is an integer number (22443945888).

Almost surely, 2^504988778385 is an apocalyptic number.

It is an amenable number.

504988778385 is an abundant number, since it is smaller than the sum of its proper divisors (572320624239).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

504988778385 is a wasteful number, since it uses less digits than its factorization.

504988778385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123318414 (or 123318411 counting only the distinct ones).

The product of its (nonzero) digits is 541900800, while the sum is 72.

The spelling of 504988778385 in words is "five hundred four billion, nine hundred eighty-eight million, seven hundred seventy-eight thousand, three hundred eighty-five".