40001645603 has 4 divisors (see below), whose sum is σ = 40414033800. Its totient is φ = 39589257408.

The previous prime is 40001645569. The next prime is 40001645617. The reversal of 40001645603 is 30654610004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40001645603 - 2⁸ = 40001645347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40001645633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206193953 + ... + 206194146.

It is an arithmetic number, because the mean of its divisors is an integer number (10103508450).

Almost surely, 2^40001645603 is an apocalyptic number.

40001645603 is a deficient number, since it is larger than the sum of its proper divisors (412388197).

40001645603 is an equidigital number, since it uses as much as digits as its factorization.

40001645603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412388196.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 40001645603 in words is "forty billion, one million, six hundred forty-five thousand, six hundred three".