10100115561 has 8 divisors (see below), whose sum is σ = 13468089760. Its totient is φ = 6732775872.

The previous prime is 10100115533. The next prime is 10100115569. The reversal of 10100115561 is 16551100101.

It is a happy number.

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

It is not a de Polignac number, because 10100115561 - 2¹⁹ = 10099591273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10100115569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120151 + ... + 186108.

It is an arithmetic number, because the mean of its divisors is an integer number (1683511220).

Almost surely, 2^10100115561 is an apocalyptic number.

It is an amenable number.

10100115561 is a deficient number, since it is larger than the sum of its proper divisors (3367974199).

10100115561 is a wasteful number, since it uses less digits than its factorization.

10100115561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317255.

The product of its (nonzero) digits is 150, while the sum is 21.

Adding to 10100115561 its reverse (16551100101), we get a palindrome (26651215662).

The spelling of 10100115561 in words is "ten billion, one hundred million, one hundred fifteen thousand, five hundred sixty-one".