5621638809 has 8 divisors (see below), whose sum is σ = 7579738080. Its totient is φ = 3705649376.

The previous prime is 5621638807. The next prime is 5621638811. The reversal of 5621638809 is 9088361265.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5621638807) and next prime (5621638811).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5621638809 - 2¹ = 5621638807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5621638807) 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 7 ways as a sum of consecutive naturals, for example, 10527147 + ... + 10527680.

It is an arithmetic number, because the mean of its divisors is an integer number (947467260).

Almost surely, 2^5621638809 is an apocalyptic number.

It is an amenable number.

5621638809 is a deficient number, since it is larger than the sum of its proper divisors (1958099271).

5621638809 is a wasteful number, since it uses less digits than its factorization.

5621638809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21054919.

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 5621638809 is about 74977.5887115610. The cubic root of 5621638809 is about 1778.0923476569.

The spelling of 5621638809 in words is "five billion, six hundred twenty-one million, six hundred thirty-eight thousand, eight hundred nine".