561611500100 has 36 divisors (see below), whose sum is σ = 1392796521984. Its totient is φ = 192552514080.

The previous prime is 561611500097. The next prime is 561611500111. The reversal of 561611500100 is 1005116165.

It is a self number, because there is not a number n which added to its sum of digits gives 561611500100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 401150372 + ... + 401151771.

Almost surely, 2^561611500100 is an apocalyptic number.

561611500100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561611500100 is an abundant number, since it is smaller than the sum of its proper divisors (831185021884).

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

561611500100 is a wasteful number, since it uses less digits than its factorization.

561611500100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802302164 (or 802302157 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 561611500100 its reverse (1005116165), we get a palindrome (562616616265).

The spelling of 561611500100 in words is "five hundred sixty-one billion, six hundred eleven million, five hundred thousand, one hundred".