2561155300 has 72 divisors (see below), whose sum is σ = 6272098560. Its totient is φ = 899203200.

The previous prime is 2561155231. The next prime is 2561155301. The reversal of 2561155300 is 35511652.

It is not an unprimeable number, because it can be changed into a prime (2561155301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8244 + ... + 72043.

It is an arithmetic number, because the mean of its divisors is an integer number (87112480).

Almost surely, 2^2561155300 is an apocalyptic number.

2561155300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2561155300 is an abundant number, since it is smaller than the sum of its proper divisors (3710943260).

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

2561155300 is a wasteful number, since it uses less digits than its factorization.

2561155300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80341 (or 80334 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 2561155300 is about 50607.8580854792. The cubic root of 2561155300 is about 1368.1865113108.

Adding to 2561155300 its reverse (35511652), we get a palindrome (2596666952).

The spelling of 2561155300 in words is "two billion, five hundred sixty-one million, one hundred fifty-five thousand, three hundred".