100445645 has 8 divisors (see below), whose sum is σ = 120606360. Its totient is φ = 80308800.

The previous prime is 100445641. The next prime is 100445659. The reversal of 100445645 is 546544001.

It can be written as a sum of positive squares in 4 ways, for example, as 67601284 + 32844361 = 8222^2 + 5731^2 .

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

It is not a de Polignac number, because 100445645 - 2² = 100445641 is a prime.

It is a super-3 number, since 3×100445645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100445641) 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, 5195 + ... + 15095.

It is an arithmetic number, because the mean of its divisors is an integer number (15075795).

Almost surely, 2^100445645 is an apocalyptic number.

It is an amenable number.

100445645 is a deficient number, since it is larger than the sum of its proper divisors (20160715).

100445645 is an equidigital number, since it uses as much as digits as its factorization.

100445645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11935.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 100445645 is about 10022.2574802287. The cubic root of 100445645 is about 464.8473619337.

Adding to 100445645 its reverse (546544001), we get a palindrome (646989646).

The spelling of 100445645 in words is "one hundred million, four hundred forty-five thousand, six hundred forty-five".