2561765335 has 16 divisors (see below), whose sum is σ = 3140298720. Its totient is φ = 2005494400.

The previous prime is 2561765317. The next prime is 2561765341. The reversal of 2561765335 is 5335671652.

It is a happy number.

It is not a de Polignac number, because 2561765335 - 2²⁵ = 2528210903 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2561765291 and 2561765300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90660 + ... + 115510.

It is an arithmetic number, because the mean of its divisors is an integer number (196268670).

Almost surely, 2^2561765335 is an apocalyptic number.

2561765335 is a deficient number, since it is larger than the sum of its proper divisors (578533385).

2561765335 is a wasteful number, since it uses less digits than its factorization.

2561765335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25298.

The product of its digits is 567000, while the sum is 43.

The square root of 2561765335 is about 50613.8848044684. The cubic root of 2561765335 is about 1368.2951309638.

The spelling of 2561765335 in words is "two billion, five hundred sixty-one million, seven hundred sixty-five thousand, three hundred thirty-five".