561715210100 has 72 divisors (see below), whose sum is σ = 1331710681728. Its totient is φ = 203956300800.

The previous prime is 561715210061. The next prime is 561715210109. The reversal of 561715210100 is 1012517165.

561715210100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561715210109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 360917 + ... + 1119683.

Almost surely, 2^561715210100 is an apocalyptic number.

561715210100 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 561715210100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665855340864).

561715210100 is an abundant number, since it is smaller than the sum of its proper divisors (769995471628).

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

561715210100 is a wasteful number, since it uses less digits than its factorization.

561715210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759465 (or 759458 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 29.

Adding to 561715210100 its reverse (1012517165), we get a palindrome (562727727265).

The spelling of 561715210100 in words is "five hundred sixty-one billion, seven hundred fifteen million, two hundred ten thousand, one hundred".