57781218775 has 48 divisors (see below), whose sum is σ = 84256625088. Its totient is φ = 38488320000.

The previous prime is 57781218743. The next prime is 57781218797.

57781218775 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 57781218775 - 2⁵ = 57781218743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 905935 + ... + 967615.

It is an arithmetic number, because the mean of its divisors is an integer number (1755346356).

Almost surely, 2^57781218775 is an apocalyptic number.

57781218775 is a deficient number, since it is larger than the sum of its proper divisors (26475406313).

57781218775 is a wasteful number, since it uses less digits than its factorization.

57781218775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61852 (or 61847 counting only the distinct ones).

The product of its digits is 7683200, while the sum is 58.

The spelling of 57781218775 in words is "fifty-seven billion, seven hundred eighty-one million, two hundred eighteen thousand, seven hundred seventy-five".