6500561100 has 144 divisors (see below), whose sum is σ = 20825083776. Its totient is φ = 1552320000.

The previous prime is 6500561083. The next prime is 6500561101. The reversal of 6500561100 is 11650056.

It is a super-2 number, since 2×6500561100² = 84514589229666420000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6500561101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206400 + ... + 235800.

Almost surely, 2^6500561100 is an apocalyptic number.

6500561100 is a gapful number since it is divisible by the number (60) 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 6500561100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10412541888).

6500561100 is an abundant number, since it is smaller than the sum of its proper divisors (14324522676).

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

6500561100 is a wasteful number, since it uses less digits than its factorization.

6500561100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29496 (or 29489 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 6500561100 is about 80626.0572023710. The cubic root of 6500561100 is about 1866.3092771715.

It can be divided in two parts, 650056 and 1100, that added together give a palindrome (651156).

The spelling of 6500561100 in words is "six billion, five hundred million, five hundred sixty-one thousand, one hundred".