5640162809 has 2 divisors, whose sum is σ = 5640162810. Its totient is φ = 5640162808.

The previous prime is 5640162779. The next prime is 5640162887. The reversal of 5640162809 is 9082610465.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4134490000 + 1505672809 = 64300^2 + 38803^2 .

It is a cyclic number.

It is not a de Polignac number, because 5640162809 - 2¹⁶ = 5640097273 is a prime.

It is a super-2 number, since 2×5640162809² = 63622873024053540962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5640122809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820081404 + 2820081405.

It is an arithmetic number, because the mean of its divisors is an integer number (2820081405).

Almost surely, 2^5640162809 is an apocalyptic number.

It is an amenable number.

5640162809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5640162809 is an equidigital number, since it uses as much as digits as its factorization.

5640162809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 5640162809 is about 75101.0173632821. The cubic root of 5640162809 is about 1780.0432183464.

The spelling of 5640162809 in words is "five billion, six hundred forty million, one hundred sixty-two thousand, eight hundred nine".