40505501903 has 4 divisors (see below), whose sum is σ = 40518080568. Its totient is φ = 40492923240.

The previous prime is 40505501893. The next prime is 40505501923. The reversal of 40505501903 is 30910550504.

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 40505501903 - 2⁴ = 40505501887 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 40505501903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505501923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6284501 + ... + 6290942.

It is an arithmetic number, because the mean of its divisors is an integer number (10129520142).

Almost surely, 2^40505501903 is an apocalyptic number.

40505501903 is a deficient number, since it is larger than the sum of its proper divisors (12578665).

40505501903 is a wasteful number, since it uses less digits than its factorization.

40505501903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12578664.

The product of its (nonzero) digits is 13500, while the sum is 32.

The spelling of 40505501903 in words is "forty billion, five hundred five million, five hundred one thousand, nine hundred three".