2561343234044 has 48 divisors (see below), whose sum is σ = 5261350617600. Its totient is φ = 1068007187520.

The previous prime is 2561343234019. The next prime is 2561343234053. The reversal of 2561343234044 is 4404323431652.

It is a junction number, because it is equal to n+sod(n) for n = 2561343233992 and 2561343234010.

It is a congruent number.

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, 45629507 + ... + 45685605.

It is an arithmetic number, because the mean of its divisors is an integer number (109611471200).

Almost surely, 2^{2561343234044} is an apocalyptic number.

It is an amenable number.

2561343234044 is an abundant number, since it is smaller than the sum of its proper divisors (2700007383556).

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

2561343234044 is a wasteful number, since it uses less digits than its factorization.

2561343234044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100218 (or 100216 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 41.

Adding to 2561343234044 its reverse (4404323431652), we get a palindrome (6965666665696).

The spelling of 2561343234044 in words is "two trillion, five hundred sixty-one billion, three hundred forty-three million, two hundred thirty-four thousand, forty-four".