5661021300 has 216 divisors, whose sum is σ = 18100695648. Its totient is φ = 1364985600.

The previous prime is 5661021281. The next prime is 5661021389. The reversal of 5661021300 is 31201665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10054819 + ... + 10055381.

Almost surely, 2^5661021300 is an apocalyptic number.

5661021300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661021300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9050347824).

5661021300 is an abundant number, since it is smaller than the sum of its proper divisors (12439674348).

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

5661021300 is a wasteful number, since it uses less digits than its factorization.

5661021300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 5661021300 is about 75239.7587715431. The cubic root of 5661021300 is about 1782.2348417827.

Adding to 5661021300 its reverse (31201665), we get a palindrome (5692222965).

The spelling of 5661021300 in words is "five billion, six hundred sixty-one million, twenty-one thousand, three hundred".