1005000561001 has 4 divisors (see below), whose sum is σ = 1005009691792. Its totient is φ = 1004991430212.

The previous prime is 1005000560989. The next prime is 1005000561007. The reversal of 1005000561001 is 1001650005001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1005000561001 - 2¹⁷ = 1005000429929 is a prime.

It is a super-2 number, since 2×1005000561001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005000561001.

It is not an unprimeable number, because it can be changed into a prime (1005000561007) 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, 4398255 + ... + 4621108.

It is an arithmetic number, because the mean of its divisors is an integer number (251252422948).

Almost surely, 2^{1005000561001} is an apocalyptic number.

It is an amenable number.

1005000561001 is a deficient number, since it is larger than the sum of its proper divisors (9130791).

1005000561001 is an equidigital number, since it uses as much as digits as its factorization.

1005000561001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9130790.

The product of its (nonzero) digits is 150, while the sum is 19.

Adding to 1005000561001 its reverse (1001650005001), we get a palindrome (2006650566002).

The spelling of 1005000561001 in words is "one trillion, five billion, five hundred sixty-one thousand, one".