40505430520491 has 32 divisors (see below), whose sum is σ = 55178309376000. Its totient is φ = 26420976711168.

The previous prime is 40505430520487. The next prime is 40505430520517. The reversal of 40505430520491 is 19402503450504.

It is not a de Polignac number, because 40505430520491 - 2² = 40505430520487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40505430520481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113225140 + ... + 113582318.

It is an arithmetic number, because the mean of its divisors is an integer number (1724322168000).

Almost surely, 2^{40505430520491} is an apocalyptic number.

40505430520491 is a deficient number, since it is larger than the sum of its proper divisors (14672878855509).

40505430520491 is a wasteful number, since it uses less digits than its factorization.

40505430520491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359203.

The product of its (nonzero) digits is 432000, while the sum is 42.

Adding to 40505430520491 its reverse (19402503450504), we get a palindrome (59907933970995).

The spelling of 40505430520491 in words is "forty trillion, five hundred five billion, four hundred thirty million, five hundred twenty thousand, four hundred ninety-one".