5621605481 has 4 divisors (see below), whose sum is σ = 5628165972. Its totient is φ = 5615044992.

The previous prime is 5621605403. The next prime is 5621605499. The reversal of 5621605481 is 1845061265.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4096000000 + 1525605481 = 64000^2 + 39059^2 .

It is a cyclic number.

It is not a de Polignac number, because 5621605481 - 2¹⁴ = 5621589097 is a prime.

It is a super-2 number, since 2×5621605481² = 63204896368018482722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5621625481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3278960 + ... + 3280673.

It is an arithmetic number, because the mean of its divisors is an integer number (1407041493).

Almost surely, 2^5621605481 is an apocalyptic number.

It is an amenable number.

5621605481 is a deficient number, since it is larger than the sum of its proper divisors (6560491).

5621605481 is an equidigital number, since it uses as much as digits as its factorization.

5621605481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560490.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 5621605481 is about 74977.3664581519. The cubic root of 5621605481 is about 1778.0888338311.

The spelling of 5621605481 in words is "five billion, six hundred twenty-one million, six hundred five thousand, four hundred eighty-one".