100561006560 has 288 divisors, whose sum is σ = 374734926720. Its totient is φ = 22595478528.

The previous prime is 100561006549. The next prime is 100561006561. The reversal of 100561006560 is 65600165001.

It is a super-2 number, since 2×100561006560² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100561006561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1351447 + ... + 1423913.

It is an arithmetic number, because the mean of its divisors is an integer number (1301162940).

Almost surely, 2^100561006560 is an apocalyptic number.

100561006560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100561006560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187367463360).

100561006560 is an abundant number, since it is smaller than the sum of its proper divisors (274173920160).

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

100561006560 is a wasteful number, since it uses less digits than its factorization.

100561006560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72558 (or 72543 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 100561006560 in words is "one hundred billion, five hundred sixty-one million, six thousand, five hundred sixty".