100544666421 has 8 divisors (see below), whose sum is σ = 136060444384. Its totient is φ = 66029333040.

The previous prime is 100544666377. The next prime is 100544666423. The reversal of 100544666421 is 124666445001.

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

It is not a de Polignac number, because 100544666421 - 2⁹ = 100544665909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100544666421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100544666423) by changing a digit.

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, 250110910 + ... + 250111311.

It is an arithmetic number, because the mean of its divisors is an integer number (17007555548).

Almost surely, 2^100544666421 is an apocalyptic number.

It is an amenable number.

100544666421 is a deficient number, since it is larger than the sum of its proper divisors (35515777963).

100544666421 is an equidigital number, since it uses as much as digits as its factorization.

100544666421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500222291.

The product of its (nonzero) digits is 138240, while the sum is 39.

It can be divided in two parts, 1005446 and 66421, that multiplied together give a palindrome (66782728766).

The spelling of 100544666421 in words is "one hundred billion, five hundred forty-four million, six hundred sixty-six thousand, four hundred twenty-one".