1005550400403 has 6 divisors (see below), whose sum is σ = 1452461689484. Its totient is φ = 670366933596.

The previous prime is 1005550400369. The next prime is 1005550400417. The reversal of 1005550400403 is 3040040555001.

1005550400403 is a `hidden beast` number, since 100 + 5 + 550 + 4 + 0 + 0 + 4 + 0 + 3 = 666.

It is not a de Polignac number, because 1005550400403 - 2⁸ = 1005550400147 is a prime.

It is a super-2 number, since 2×1005550400403² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005550400003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55863911125 + ... + 55863911142.

Almost surely, 2^{1005550400403} is an apocalyptic number.

1005550400403 is a deficient number, since it is larger than the sum of its proper divisors (446911289081).

1005550400403 is a wasteful number, since it uses less digits than its factorization.

1005550400403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111727822273 (or 111727822270 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 1005550400403 its reverse (3040040555001), we get a palindrome (4045590955404).

The spelling of 1005550400403 in words is "one trillion, five billion, five hundred fifty million, four hundred thousand, four hundred three".