102444211645 has 8 divisors (see below), whose sum is σ = 124617068856. Its totient is φ = 80832692736.

The previous prime is 102444211633. The next prime is 102444211679. The reversal of 102444211645 is 546112444201.

It can be written as a sum of positive squares in 4 ways, for example, as 6727608484 + 95716603161 = 82022^2 + 309381^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 102444211645 - 2¹³ = 102444203453 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 102444211645.

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, 140334172 + ... + 140334901.

It is an arithmetic number, because the mean of its divisors is an integer number (15577133607).

Almost surely, 2^102444211645 is an apocalyptic number.

It is an amenable number.

102444211645 is a deficient number, since it is larger than the sum of its proper divisors (22172857211).

102444211645 is an equidigital number, since it uses as much as digits as its factorization.

102444211645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280669151.

The product of its (nonzero) digits is 30720, while the sum is 34.

Adding to 102444211645 its reverse (546112444201), we get a palindrome (648556655846).

The spelling of 102444211645 in words is "one hundred two billion, four hundred forty-four million, two hundred eleven thousand, six hundred forty-five".