100500100561 has 8 divisors (see below), whose sum is σ = 118817853120. Its totient is φ = 83172496848.

The previous prime is 100500100541. The next prime is 100500100583. The reversal of 100500100561 is 165001005001.

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

It is not a de Polignac number, because 100500100561 - 2⁵ = 100500100529 is a prime.

It is a super-2 number, since 2×100500100561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100500100541) 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, 247536991 + ... + 247537396.

It is an arithmetic number, because the mean of its divisors is an integer number (14852231640).

Almost surely, 2^100500100561 is an apocalyptic number.

It is an amenable number.

100500100561 is a deficient number, since it is larger than the sum of its proper divisors (18317752559).

100500100561 is an equidigital number, since it uses as much as digits as its factorization.

100500100561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495074423.

The product of its (nonzero) digits is 150, while the sum is 19.

Adding to 100500100561 its reverse (165001005001), we get a palindrome (265501105562).

The spelling of 100500100561 in words is "one hundred billion, five hundred million, one hundred thousand, five hundred sixty-one".