100561010556 has 12 divisors (see below), whose sum is σ = 234642357992. Its totient is φ = 33520336848.

The previous prime is 100561010551. The next prime is 100561010593. The reversal of 100561010556 is 655010165001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×100561010556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100561010551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4190042095 + ... + 4190042118.

Almost surely, 2^100561010556 is an apocalyptic number.

It is an amenable number.

100561010556 is an abundant number, since it is smaller than the sum of its proper divisors (134081347436).

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

100561010556 is a wasteful number, since it uses less digits than its factorization.

100561010556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8380084220 (or 8380084218 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 100561010556 its reverse (655010165001), we get a palindrome (755571175557).

The spelling of 100561010556 in words is "one hundred billion, five hundred sixty-one million, ten thousand, five hundred fifty-six".