261351162 has 96 divisors (see below), whose sum is σ = 618254208. Its totient is φ = 79567488.

The previous prime is 261351151. The next prime is 261351203. The reversal of 261351162 is 261153162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 943368 + ... + 943644.

It is an arithmetic number, because the mean of its divisors is an integer number (6440148).

Almost surely, 2^261351162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261351162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309127104).

261351162 is an abundant number, since it is smaller than the sum of its proper divisors (356903046).

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

261351162 is a wasteful number, since it uses less digits than its factorization.

261351162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 401 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 261351162 is about 16166.3589592709. The cubic root of 261351162 is about 639.3541352198.

The spelling of 261351162 in words is "two hundred sixty-one million, three hundred fifty-one thousand, one hundred sixty-two".