5145647866 has 4 divisors (see below), whose sum is σ = 7718471802. Its totient is φ = 2572823932.

The previous prime is 5145647833. The next prime is 5145647867. The reversal of 5145647866 is 6687465415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6687465415 = 5 ⋅1337493083.

It can be written as a sum of positive squares in only one way, i.e., 4829555025 + 316092841 = 69495^2 + 17779^2 .

It is not an unprimeable number, because it can be changed into a prime (5145647867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1286411965 + ... + 1286411968.

Almost surely, 2^5145647866 is an apocalyptic number.

5145647866 is a deficient number, since it is larger than the sum of its proper divisors (2572823936).

5145647866 is a wasteful number, since it uses less digits than its factorization.

5145647866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572823935.

The product of its digits is 4838400, while the sum is 52.

The square root of 5145647866 is about 71733.1713086770. The cubic root of 5145647866 is about 1726.4209104391.

The spelling of 5145647866 in words is "five billion, one hundred forty-five million, six hundred forty-seven thousand, eight hundred sixty-six".