52057155866 has 4 divisors (see below), whose sum is σ = 78085733802. Its totient is φ = 26028577932.

The previous prime is 52057155803. The next prime is 52057155893. The reversal of 52057155866 is 66855175025.

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

It can be written as a sum of positive squares in only one way, i.e., 33204492841 + 18852663025 = 182221^2 + 137305^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13014288965 + ... + 13014288968.

Almost surely, 2^52057155866 is an apocalyptic number.

52057155866 is a deficient number, since it is larger than the sum of its proper divisors (26028577936).

52057155866 is a wasteful number, since it uses less digits than its factorization.

52057155866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26028577935.

The product of its (nonzero) digits is 2520000, while the sum is 50.

The spelling of 52057155866 in words is "fifty-two billion, fifty-seven million, one hundred fifty-five thousand, eight hundred sixty-six".