561061001001 has 32 divisors (see below), whose sum is σ = 784783071360. Its totient is φ = 356057178624.

The previous prime is 561061000963. The next prime is 561061001003. The reversal of 561061001001 is 100100160165.

561061001001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561061001001 - 2⁷ = 561061000873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561061001003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17786095 + ... + 17817611.

It is an arithmetic number, because the mean of its divisors is an integer number (24524470980).

Almost surely, 2^561061001001 is an apocalyptic number.

It is an amenable number.

561061001001 is a deficient number, since it is larger than the sum of its proper divisors (223722070359).

561061001001 is a wasteful number, since it uses less digits than its factorization.

561061001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34425.

The product of its (nonzero) digits is 180, while the sum is 21.

Adding to 561061001001 its reverse (100100160165), we get a palindrome (661161161166).

The spelling of 561061001001 in words is "five hundred sixty-one billion, sixty-one million, one thousand, one".