40203666551 has 8 divisors (see below), whose sum is σ = 40281243600. Its totient is φ = 40126141440.

The previous prime is 40203666521. The next prime is 40203666557. The reversal of 40203666551 is 15566630204.

It is a happy number.

40203666551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40203666551 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1766120 + ... + 1788738.

It is an arithmetic number, because the mean of its divisors is an integer number (5035155450).

Almost surely, 2^40203666551 is an apocalyptic number.

40203666551 is a deficient number, since it is larger than the sum of its proper divisors (77577049).

40203666551 is a wasteful number, since it uses less digits than its factorization.

40203666551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25969.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 40203666551 in words is "forty billion, two hundred three million, six hundred sixty-six thousand, five hundred fifty-one".