561051100001 has 24 divisors (see below), whose sum is σ = 681965182080. Its totient is φ = 459358808832.

The previous prime is 561051099971. The next prime is 561051100003. The reversal of 561051100001 is 100001150165.

It is not a de Polignac number, because 561051100001 - 2²² = 561046905697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561051100003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 476945 + ... + 1161713.

It is an arithmetic number, because the mean of its divisors is an integer number (28415215920).

Almost surely, 2^561051100001 is an apocalyptic number.

It is an amenable number.

561051100001 is a deficient number, since it is larger than the sum of its proper divisors (120914082079).

561051100001 is a wasteful number, since it uses less digits than its factorization.

561051100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685533 (or 685526 counting only the distinct ones).

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

Adding to 561051100001 its reverse (100001150165), we get a palindrome (661052250166).

The spelling of 561051100001 in words is "five hundred sixty-one billion, fifty-one million, one hundred thousand, one".