40203666550 has 48 divisors (see below), whose sum is σ = 78739491600. Its totient is φ = 15230246400.

The previous prime is 40203666521. The next prime is 40203666557. The reversal of 40203666550 is 5566630204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40203666557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4822786 + ... + 4831114.

It is an arithmetic number, because the mean of its divisors is an integer number (1640406075).

Almost surely, 2^40203666550 is an apocalyptic number.

40203666550 is a deficient number, since it is larger than the sum of its proper divisors (38535825050).

40203666550 is a wasteful number, since it uses less digits than its factorization.

40203666550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13441 (or 13436 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 40203666550 in words is "forty billion, two hundred three million, six hundred sixty-six thousand, five hundred fifty".