261173346 has 48 divisors (see below), whose sum is σ = 634178496. Its totient is φ = 70228224.

The previous prime is 261173293. The next prime is 261173359. The reversal of 261173346 is 643371162.

It is a super-3 number, since 3×261173346³ (a number of 26 digits) contains 333 as substring.

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, 1380 + ... + 22896.

It is an arithmetic number, because the mean of its divisors is an integer number (13212052).

Almost surely, 2^261173346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261173346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317089248).

261173346 is an abundant number, since it is smaller than the sum of its proper divisors (373005150).

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

261173346 is a wasteful number, since it uses less digits than its factorization.

261173346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21563 (or 21546 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 261173346 is about 16160.8584549213. The cubic root of 261173346 is about 639.2091027827.

It can be divided in two parts, 2611 and 73346, that added together give a palindrome (75957).

The spelling of 261173346 in words is "two hundred sixty-one million, one hundred seventy-three thousand, three hundred forty-six".