261128251300 has 72 divisors (see below), whose sum is σ = 647687045376. Its totient is φ = 89517384960.

The previous prime is 261128251291. The next prime is 261128251339. The reversal of 261128251300 is 3152821162.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6126864 + ... + 6169336.

It is an arithmetic number, because the mean of its divisors is an integer number (8995653408).

Almost surely, 2^261128251300 is an apocalyptic number.

261128251300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261128251300 is an abundant number, since it is smaller than the sum of its proper divisors (386558794076).

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

261128251300 is a wasteful number, since it uses less digits than its factorization.

261128251300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51277 (or 51270 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 261128251300 in words is "two hundred sixty-one billion, one hundred twenty-eight million, two hundred fifty-one thousand, three hundred".