561243543135460 has 48 divisors (see below), whose sum is σ = 1180991073593520. Its totient is φ = 224044201704960.

The previous prime is 561243543135349. The next prime is 561243543135491. The reversal of 561243543135460 is 64531345342165.

It can be written as a sum of positive squares in 8 ways, for example, as 71907822103104 + 489335721032356 = 8479848^2 + 22120934^2 .

It is a super-2 number, since 2×561243543135460² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561243543135398 and 561243543135407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187260622 + ... + 190234138.

It is an arithmetic number, because the mean of its divisors is an integer number (24603980699865).

Almost surely, 2^{561243543135460} is an apocalyptic number.

It is an amenable number.

561243543135460 is an abundant number, since it is smaller than the sum of its proper divisors (619747530458060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561243543135460 is a wasteful number, since it uses less digits than its factorization.

561243543135460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992576 (or 2992574 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 52.

The spelling of 561243543135460 in words is "five hundred sixty-one trillion, two hundred forty-three billion, five hundred forty-three million, one hundred thirty-five thousand, four hundred sixty".