52506197866 has 4 divisors (see below), whose sum is σ = 78759296802. Its totient is φ = 26253098932.

The previous prime is 52506197839. The next prime is 52506197869. The reversal of 52506197866 is 66879160525.

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., 43199544025 + 9306653841 = 207845^2 + 96471^2 .

It is not an unprimeable number, because it can be changed into a prime (52506197869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13126549465 + ... + 13126549468.

Almost surely, 2^52506197866 is an apocalyptic number.

52506197866 is a deficient number, since it is larger than the sum of its proper divisors (26253098936).

52506197866 is a wasteful number, since it uses less digits than its factorization.

52506197866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26253098935.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 52506197866 in words is "fifty-two billion, five hundred six million, one hundred ninety-seven thousand, eight hundred sixty-six".