5661622540 has 96 divisors (see below), whose sum is σ = 14414561280. Its totient is φ = 1823468544.

The previous prime is 5661622493. The next prime is 5661622553. The reversal of 5661622540 is 452261665.

It is a self number, because there is not a number n which added to its sum of digits gives 5661622540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1442701 + ... + 1446619.

It is an arithmetic number, because the mean of its divisors is an integer number (150151680).

Almost surely, 2^5661622540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661622540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7207280640).

5661622540 is an abundant number, since it is smaller than the sum of its proper divisors (8752938740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5661622540 is a wasteful number, since it uses less digits than its factorization.

5661622540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4559 (or 4557 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 5661622540 is about 75243.7541593985. The cubic root of 5661622540 is about 1782.2979348117.

The spelling of 5661622540 in words is "five billion, six hundred sixty-one million, six hundred twenty-two thousand, five hundred forty".