5645424866 has 4 divisors (see below), whose sum is σ = 8468137302. Its totient is φ = 2822712432.

The previous prime is 5645424859. The next prime is 5645424871. The reversal of 5645424866 is 6684245465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6684245465 = 5 ⋅1336849093.

It can be written as a sum of positive squares in only one way, i.e., 4007523025 + 1637901841 = 63305^2 + 40471^2 .

It is a super-2 number, since 2×5645424866² = 63741643835302235912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1411356215 + ... + 1411356218.

Almost surely, 2^5645424866 is an apocalyptic number.

5645424866 is a deficient number, since it is larger than the sum of its proper divisors (2822712436).

5645424866 is a wasteful number, since it uses less digits than its factorization.

5645424866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822712435.

The product of its digits is 5529600, while the sum is 50.

The square root of 5645424866 is about 75136.0423897879. The cubic root of 5645424866 is about 1780.5966171153.

The spelling of 5645424866 in words is "five billion, six hundred forty-five million, four hundred twenty-four thousand, eight hundred sixty-six".