2561622308 has 24 divisors (see below), whose sum is σ = 5137944000. Its totient is φ = 1094688288.

The previous prime is 2561622241. The next prime is 2561622311. The reversal of 2561622308 is 8032261652.

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 7 ways as a sum of consecutive naturals, for example, 121298 + ... + 140841.

It is an arithmetic number, because the mean of its divisors is an integer number (214081000).

Almost surely, 2^2561622308 is an apocalyptic number.

2561622308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2561622308 is an abundant number, since it is smaller than the sum of its proper divisors (2576321692).

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

2561622308 is a wasteful number, since it uses less digits than its factorization.

2561622308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262499 (or 262497 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 2561622308 is about 50612.4718621804. The cubic root of 2561622308 is about 1368.2696658692.

The spelling of 2561622308 in words is "two billion, five hundred sixty-one million, six hundred twenty-two thousand, three hundred eight".