5400001809 has 20 divisors (see below), whose sum is σ = 8140688820. Its totient is φ = 3566967840.

The previous prime is 5400001807. The next prime is 5400001819. The reversal of 5400001809 is 9081000045.

It can be written as a sum of positive squares in 2 ways, for example, as 2706080400 + 2693921409 = 52020^2 + 51903^2 .

It is not a de Polignac number, because 5400001809 - 2¹ = 5400001807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (5400001807) by changing a digit.

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 in 19 ways as a sum of consecutive naturals, for example, 296982 + ... + 314639.

It is an arithmetic number, because the mean of its divisors is an integer number (407034441).

Almost surely, 2^5400001809 is an apocalyptic number.

It is an amenable number.

5400001809 is a deficient number, since it is larger than the sum of its proper divisors (2740687011).

5400001809 is a wasteful number, since it uses less digits than its factorization.

5400001809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611742 (or 611733 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 5400001809 is about 73484.7045921803. The cubic root of 5400001809 is about 1754.4108388369.

The spelling of 5400001809 in words is "five billion, four hundred million, one thousand, eight hundred nine".