75858685857 has 6 divisors (see below), whose sum is σ = 109573657362. Its totient is φ = 50572457232.

The previous prime is 75858685841. The next prime is 75858685879.

It is a happy number.

75858685857 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 74376743841 + 1481942016 = 272721^2 + 38496^2 .

It is not a de Polignac number, because 75858685857 - 2⁴ = 75858685841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75858685757) 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 5 ways as a sum of consecutive naturals, for example, 4214371428 + ... + 4214371445.

It is an arithmetic number, because the mean of its divisors is an integer number (18262276227).

Almost surely, 2^75858685857 is an apocalyptic number.

It is an amenable number.

75858685857 is a deficient number, since it is larger than the sum of its proper divisors (33714971505).

75858685857 is a wasteful number, since it uses less digits than its factorization.

75858685857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8428742879 (or 8428742876 counting only the distinct ones).

The product of its digits is 752640000, while the sum is 72.

The spelling of 75858685857 in words is "seventy-five billion, eight hundred fifty-eight million, six hundred eighty-five thousand, eight hundred fifty-seven".