2561363343 has 128 divisors (see below), whose sum is σ = 5066342400. Its totient is φ = 1238716800.

The previous prime is 2561363339. The next prime is 2561363377. The reversal of 2561363343 is 3433631652.

2561363343 is a `hidden beast` number, since 2 + 5 + 6 + 13 + 633 + 4 + 3 = 666.

It is not a de Polignac number, because 2561363343 - 2² = 2561363339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2561363298 and 2561363307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561363303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2409030 + ... + 2410092.

It is an arithmetic number, because the mean of its divisors is an integer number (39580800).

Almost surely, 2^2561363343 is an apocalyptic number.

2561363343 is a deficient number, since it is larger than the sum of its proper divisors (2504979057).

2561363343 is a wasteful number, since it uses less digits than its factorization.

2561363343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 1164 counting only the distinct ones).

The product of its digits is 116640, while the sum is 36.

The square root of 2561363343 is about 50609.9134854032. The cubic root of 2561363343 is about 1368.2235563011.

Adding to 2561363343 its reverse (3433631652), we get a palindrome (5994994995).

The spelling of 2561363343 in words is "two billion, five hundred sixty-one million, three hundred sixty-three thousand, three hundred forty-three".