2561235036 has 24 divisors (see below), whose sum is σ = 6290753280. Its totient is φ = 808810992.

The previous prime is 2561235013. The next prime is 2561235037. The reversal of 2561235036 is 6305321652.

It is a junction number, because it is equal to n+sod(n) for n = 2561234988 and 2561235006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561235037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5616516 + ... + 5616971.

It is an arithmetic number, because the mean of its divisors is an integer number (262114720).

Almost surely, 2^2561235036 is an apocalyptic number.

It is an amenable number.

2561235036 is an abundant number, since it is smaller than the sum of its proper divisors (3729518244).

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

2561235036 is a wasteful number, since it uses less digits than its factorization.

2561235036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11233513 (or 11233511 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 2561235036 is about 50608.6458621449. The cubic root of 2561235036 is about 1368.2007096672.

Adding to 2561235036 its reverse (6305321652), we get a palindrome (8866556688).

The spelling of 2561235036 in words is "two billion, five hundred sixty-one million, two hundred thirty-five thousand, thirty-six".