561000005601 has 32 divisors (see below), whose sum is σ = 865373104896. Its totient is φ = 316643040000.

The previous prime is 561000005521. The next prime is 561000005609. The reversal of 561000005601 is 106500000165.

It is not a de Polignac number, because 561000005601 - 2⁷ = 561000005473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561000005609) 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, 578811 + ... + 1207071.

It is an arithmetic number, because the mean of its divisors is an integer number (27042909528).

Almost surely, 2^561000005601 is an apocalyptic number.

It is an amenable number.

561000005601 is a deficient number, since it is larger than the sum of its proper divisors (304373099295).

561000005601 is a wasteful number, since it uses less digits than its factorization.

561000005601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628793.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 561000005601 its reverse (106500000165), we get a palindrome (667500005766).

The spelling of 561000005601 in words is "five hundred sixty-one billion, five thousand, six hundred one".