100123565560 has 32 divisors (see below), whose sum is σ = 225289103040. Its totient is φ = 40047456384.

The previous prime is 100123565533. The next prime is 100123565617. The reversal of 100123565560 is 65565321001.

It is a super-2 number, since 2×100123565560² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979009 + ... + 1076431.

It is an arithmetic number, because the mean of its divisors is an integer number (7040284470).

Almost surely, 2^100123565560 is an apocalyptic number.

100123565560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100123565560 is an abundant number, since it is smaller than the sum of its proper divisors (125165537480).

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

100123565560 is a wasteful number, since it uses less digits than its factorization.

100123565560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123127 (or 123123 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

Adding to 100123565560 its reverse (65565321001), we get a palindrome (165688886561).

The spelling of 100123565560 in words is "one hundred billion, one hundred twenty-three million, five hundred sixty-five thousand, five hundred sixty".