561098499122 has 54 divisors (see below), whose sum is σ = 1040272834941. Its totient is φ = 226274596800.

The previous prime is 561098499089. The next prime is 561098499151. The reversal of 561098499122 is 221994890165.

It can be written as a sum of positive squares in 2 ways, for example, as 513531325321 + 47567173801 = 716611^2 + 218099^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=529669.

It is a super-2 number, since 2×561098499122² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 126058997 + ... + 126063447.

Almost surely, 2^561098499122 is an apocalyptic number.

561098499122 is a deficient number, since it is larger than the sum of its proper divisors (479174335819).

561098499122 is an frugal number, since it uses more digits than its factorization.

561098499122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8952 (or 4477 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 561098499122 in words is "five hundred sixty-one billion, ninety-eight million, four hundred ninety-nine thousand, one hundred twenty-two".