100561879128 has 32 divisors (see below), whose sum is σ = 252447885360. Its totient is φ = 33381534720.

The previous prime is 100561879081. The next prime is 100561879129. The reversal of 100561879128 is 821978165001.

It is a happy number.

It is a super-2 number, since 2×100561879128² (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 (100561879129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8687325 + ... + 8698892.

Almost surely, 2^100561879128 is an apocalyptic number.

It is an amenable number.

100561879128 is an abundant number, since it is smaller than the sum of its proper divisors (151886006232).

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

100561879128 is a wasteful number, since it uses less digits than its factorization.

100561879128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17386467 (or 17386463 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 48.

The spelling of 100561879128 in words is "one hundred billion, five hundred sixty-one million, eight hundred seventy-nine thousand, one hundred twenty-eight".