261124761140 has 12 divisors (see below), whose sum is σ = 548361998436. Its totient is φ = 104449904448.

The previous prime is 261124761137. The next prime is 261124761217. The reversal of 261124761140 is 41167421162.

It can be written as a sum of positive squares in 2 ways, for example, as 173610555556 + 87514205584 = 416666^2 + 295828^2 .

It is a super-2 number, since 2×261124761140² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261124761140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6528119009 + ... + 6528119048.

It is an arithmetic number, because the mean of its divisors is an integer number (45696833203).

Almost surely, 2^261124761140 is an apocalyptic number.

261124761140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261124761140 is an abundant number, since it is smaller than the sum of its proper divisors (287237237296).

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

261124761140 is a wasteful number, since it uses less digits than its factorization.

261124761140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13056238066 (or 13056238064 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 261124761140 in words is "two hundred sixty-one billion, one hundred twenty-four million, seven hundred sixty-one thousand, one hundred forty".