33057057857 has 4 divisors (see below), whose sum is σ = 33509894340. Its totient is φ = 32604221376.

The previous prime is 33057057853. The next prime is 33057057871. The reversal of 33057057857 is 75875075033.

It is a Cunningham number, because it is equal to 181816²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18764616256 + 14292441601 = 136984^2 + 119551^2 .

It is a cyclic number.

It is not a de Polignac number, because 33057057857 - 2² = 33057057853 is a prime.

It is a super-2 number, since 2×33057057857² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33057057851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226418132 + ... + 226418277.

It is an arithmetic number, because the mean of its divisors is an integer number (8377473585).

Almost surely, 2^33057057857 is an apocalyptic number.

It is an amenable number.

33057057857 is a deficient number, since it is larger than the sum of its proper divisors (452836483).

33057057857 is an equidigital number, since it uses as much as digits as its factorization.

33057057857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452836482.

The product of its (nonzero) digits is 3087000, while the sum is 50.

The spelling of 33057057857 in words is "thirty-three billion, fifty-seven million, fifty-seven thousand, eight hundred fifty-seven".