2561108355 has 64 divisors (see below), whose sum is σ = 4914483840. Its totient is φ = 1257984000.

The previous prime is 2561108353. The next prime is 2561108371. The reversal of 2561108355 is 5538011652.

It is a happy number.

2561108355 is a `hidden beast` number, since 2 + 5 + 611 + 0 + 8 + 35 + 5 = 666.

It is not a de Polignac number, because 2561108355 - 2¹ = 2561108353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2561108353) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 912955 + ... + 915755.

It is an arithmetic number, because the mean of its divisors is an integer number (76788810).

Almost surely, 2^2561108355 is an apocalyptic number.

2561108355 is a deficient number, since it is larger than the sum of its proper divisors (2353375485).

2561108355 is a wasteful number, since it uses less digits than its factorization.

2561108355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349 (or 3343 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 2561108355 is about 50607.3942719836. The cubic root of 2561108355 is about 1368.1781518140.

The spelling of 2561108355 in words is "two billion, five hundred sixty-one million, one hundred eight thousand, three hundred fifty-five".