261161114250 has 64 divisors (see below), whose sum is σ = 651976221312. Its totient is φ = 69630348800.

The previous prime is 261161114209. The next prime is 261161114261. The reversal of 261161114250 is 52411161162.

It is a super-3 number, since 3×261161114250³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4556269 + ... + 4613231.

It is an arithmetic number, because the mean of its divisors is an integer number (10187128458).

Almost surely, 2^261161114250 is an apocalyptic number.

261161114250 is an abundant number, since it is smaller than the sum of its proper divisors (390815107062).

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

261161114250 is a wasteful number, since it uses less digits than its factorization.

261161114250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63096 (or 63086 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

It can be divided in two parts, 261161 and 114250, that added together give a triangular number (375411 = T₈₆₆).

The spelling of 261161114250 in words is "two hundred sixty-one billion, one hundred sixty-one million, one hundred fourteen thousand, two hundred fifty".