2561236104 has 64 divisors (see below), whose sum is σ = 7329974400. Its totient is φ = 730566144.

The previous prime is 2561236061. The next prime is 2561236127. The reversal of 2561236104 is 4016321652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91302 + ... + 116010.

It is an arithmetic number, because the mean of its divisors is an integer number (114530850).

Almost surely, 2^2561236104 is an apocalyptic number.

2561236104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2561236104 is an abundant number, since it is smaller than the sum of its proper divisors (4768738296).

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

2561236104 is a wasteful number, since it uses less digits than its factorization.

2561236104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25342 (or 25338 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2561236104 is about 50608.6564137006. The cubic root of 2561236104 is about 1368.2008998409.

Adding to 2561236104 its reverse (4016321652), we get a palindrome (6577557756).

It can be divided in two parts, 25612 and 36104, that added together give a palindrome (61716).

The spelling of 2561236104 in words is "two billion, five hundred sixty-one million, two hundred thirty-six thousand, one hundred four".