2561340312 has 32 divisors (see below), whose sum is σ = 7114834800. Its totient is φ = 853780032.

The previous prime is 2561340307. The next prime is 2561340317. The reversal of 2561340312 is 2130431652.

2561340312 is a `hidden beast` number, since 2 + 5 + 6 + 1 + 340 + 312 = 666.

2561340312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2561340307) and next prime (2561340317).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561340317) 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, 5928813 + ... + 5929244.

Almost surely, 2^2561340312 is an apocalyptic number.

It is an amenable number.

2561340312 is an abundant number, since it is smaller than the sum of its proper divisors (4553494488).

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

2561340312 is a wasteful number, since it uses less digits than its factorization.

2561340312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11858072 (or 11858062 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2561340312 is about 50609.6859504186. The cubic root of 2561340312 is about 1368.2194554054.

Adding to 2561340312 its reverse (2130431652), we get a palindrome (4691771964).

It can be divided in two parts, 2561340 and 312, that added together give a palindrome (2561652).

The spelling of 2561340312 in words is "two billion, five hundred sixty-one million, three hundred forty thousand, three hundred twelve".