1005556001011 has 4 divisors (see below), whose sum is σ = 1009109202712. Its totient is φ = 1002002799312.

The previous prime is 1005556000993. The next prime is 1005556001033. The reversal of 1005556001011 is 1101006555001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1005556001011 - 2²¹ = 1005553903859 is a prime.

It is a super-2 number, since 2×1005556001011² (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 (1005556011011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776600426 + ... + 1776600991.

It is an arithmetic number, because the mean of its divisors is an integer number (252277300678).

Almost surely, 2^{1005556001011} is an apocalyptic number.

1005556001011 is a deficient number, since it is larger than the sum of its proper divisors (3553201701).

1005556001011 is an equidigital number, since it uses as much as digits as its factorization.

1005556001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553201700.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 1005556001011 in words is "one trillion, five billion, five hundred fifty-six million, one thousand, eleven".