1005555550111 has 24 divisors (see below), whose sum is σ = 1184111565840. Its totient is φ = 851341220352.

The previous prime is 1005555550091. The next prime is 1005555550123. The reversal of 1005555550111 is 1110555555001.

It is a de Polignac number, because none of the positive numbers 2^k-1005555550111 is a prime.

It is a super-2 number, since 2×1005555550111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005555550151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2211456 + ... + 2627098.

It is an arithmetic number, because the mean of its divisors is an integer number (49337981910).

Almost surely, 2^{1005555550111} is an apocalyptic number.

1005555550111 is a deficient number, since it is larger than the sum of its proper divisors (178556015729).

1005555550111 is an equidigital number, since it uses as much as digits as its factorization.

1005555550111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416263 (or 416256 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 34.

The spelling of 1005555550111 in words is "one trillion, five billion, five hundred fifty-five million, five hundred fifty thousand, one hundred eleven".