5561001011 has 12 divisors (see below), whose sum is σ = 5791712472. Its totient is φ = 5336280000.

The previous prime is 5561001001. The next prime is 5561001023. The reversal of 5561001011 is 1101001655.

It is not a de Polignac number, because 5561001011 - 2²² = 5556806707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5561001001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134336 + ... + 170786.

It is an arithmetic number, because the mean of its divisors is an integer number (482642706).

Almost surely, 2^5561001011 is an apocalyptic number.

5561001011 is a deficient number, since it is larger than the sum of its proper divisors (230711461).

5561001011 is an equidigital number, since it uses as much as digits as its factorization.

5561001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36614 (or 36553 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 5561001011 is about 74572.1195286818. The cubic root of 5561001011 is about 1771.6760923304.

Adding to 5561001011 its reverse (1101001655), we get a palindrome (6662002666).

The spelling of 5561001011 in words is "five billion, five hundred sixty-one million, one thousand, eleven".