2561652117116 has 24 divisors (see below), whose sum is σ = 4544444773344. Its totient is φ = 1263240437760.

The previous prime is 2561652117109. The next prime is 2561652117119. The reversal of 2561652117116 is 6117112561652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561652117119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10467836 + ... + 10709756.

It is an arithmetic number, because the mean of its divisors is an integer number (189351865556).

Almost surely, 2^{2561652117116} is an apocalyptic number.

It is an amenable number.

2561652117116 is a deficient number, since it is larger than the sum of its proper divisors (1982792656228).

2561652117116 is a wasteful number, since it uses less digits than its factorization.

2561652117116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278261 (or 278259 counting only the distinct ones).

The product of its digits is 151200, while the sum is 44.

Adding to 2561652117116 its reverse (6117112561652), we get a palindrome (8678764678768).

The spelling of 2561652117116 in words is "two trillion, five hundred sixty-one billion, six hundred fifty-two million, one hundred seventeen thousand, one hundred sixteen".