100217789845 has 8 divisors (see below), whose sum is σ = 121452054840. Its totient is φ = 79380427200.

The previous prime is 100217789843. The next prime is 100217789869. The reversal of 100217789845 is 548987712001.

It can be written as a sum of positive squares in 4 ways, for example, as 10902283396 + 89315506449 = 104414^2 + 298857^2 .

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

It is not a de Polignac number, because 100217789845 - 2¹ = 100217789843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100217789792 and 100217789801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100217789843) 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, 99225030 + ... + 99226039.

It is an arithmetic number, because the mean of its divisors is an integer number (15181506855).

Almost surely, 2^100217789845 is an apocalyptic number.

It is an amenable number.

100217789845 is a deficient number, since it is larger than the sum of its proper divisors (21234264995).

100217789845 is a wasteful number, since it uses less digits than its factorization.

100217789845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198451175.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 100217789845 in words is "one hundred billion, two hundred seventeen million, seven hundred eighty-nine thousand, eight hundred forty-five".