11445661561003 has 8 divisors (see below), whose sum is σ = 11562864849360. Its totient is φ = 11328680040480.

The previous prime is 11445661561001. The next prime is 11445661561021. The reversal of 11445661561003 is 30016516654411.

It is a happy number.

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 11445661561003 - 2¹ = 11445661561001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11445661561001) 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, 55338208 + ... + 55544653.

It is an arithmetic number, because the mean of its divisors is an integer number (1445358106170).

Almost surely, 2^{11445661561003} is an apocalyptic number.

11445661561003 is a deficient number, since it is larger than the sum of its proper divisors (117203288357).

11445661561003 is a wasteful number, since it uses less digits than its factorization.

11445661561003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110883917.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 11445661561003 in words is "eleven trillion, four hundred forty-five billion, six hundred sixty-one million, five hundred sixty-one thousand, three".