261111474 has 48 divisors (see below), whose sum is σ = 613431000. Its totient is φ = 79792128.

The previous prime is 261111467. The next prime is 261111497. The reversal of 261111474 is 474111162.

261111474 is a `hidden beast` number, since 2 + 611 + 1 + 1 + 47 + 4 = 666.

261111474 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 125552025 + 135559449 = 11205^2 + 11643^2 .

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, 31122 + ... + 38610.

Almost surely, 2^261111474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261111474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306715500).

261111474 is an abundant number, since it is smaller than the sum of its proper divisors (352319526).

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

261111474 is a wasteful number, since it uses less digits than its factorization.

261111474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7659 (or 7656 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 261111474 is about 16158.9440867898. The cubic root of 261111474 is about 639.1586225561.

It can be divided in two parts, 26111147 and 4, that added together give a triangular number (26111151 = T₇₂₂₆).

The spelling of 261111474 in words is "two hundred sixty-one million, one hundred eleven thousand, four hundred seventy-four".