57778786668 has 48 divisors (see below), whose sum is σ = 146490659840. Its totient is φ = 17657352000.

The previous prime is 57778786661. The next prime is 57778786679. The reversal of 57778786668 is 86668787775.

It is a self number, because there is not a number n which added to its sum of digits gives 57778786668.

It is not an unprimeable number, because it can be changed into a prime (57778786661) 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 15 ways as a sum of consecutive naturals, for example, 4080283 + ... + 4094418.

Almost surely, 2^57778786668 is an apocalyptic number.

It is an amenable number.

57778786668 is an abundant number, since it is smaller than the sum of its proper divisors (88711873172).

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

57778786668 is a wasteful number, since it uses less digits than its factorization.

57778786668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8174758 (or 8174756 counting only the distinct ones).

The product of its digits is 1327656960, while the sum is 75.

The spelling of 57778786668 in words is "fifty-seven billion, seven hundred seventy-eight million, seven hundred eighty-six thousand, six hundred sixty-eight".