100561006559 has 8 divisors (see below), whose sum is σ = 114666849360. Its totient is φ = 87365218176.

The previous prime is 100561006549. The next prime is 100561006561. The reversal of 100561006559 is 955600165001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100561006559 - 2²⁸ = 100292571103 is a prime.

It is a super-2 number, since 2×100561006559² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100561006529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227513369 + ... + 227513810.

It is an arithmetic number, because the mean of its divisors is an integer number (14333356170).

Almost surely, 2^100561006559 is an apocalyptic number.

100561006559 is a deficient number, since it is larger than the sum of its proper divisors (14105842801).

100561006559 is a wasteful number, since it uses less digits than its factorization.

100561006559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455027209.

The product of its (nonzero) digits is 40500, while the sum is 38.

The spelling of 100561006559 in words is "one hundred billion, five hundred sixty-one million, six thousand, five hundred fifty-nine".