261163032 has 64 divisors (see below), whose sum is σ = 709793280. Its totient is φ = 79596672.

The previous prime is 261162997. The next prime is 261163033. The reversal of 261163032 is 230361162.

It is a happy number.

It is a super-2 number, since 2×261163032² = 136412258566866048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 261162993 and 261163011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261163033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29473 + ... + 37295.

It is an arithmetic number, because the mean of its divisors is an integer number (11090520).

Almost surely, 2^261163032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261163032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354896640).

261163032 is an abundant number, since it is smaller than the sum of its proper divisors (448630248).

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

261163032 is a wasteful number, since it uses less digits than its factorization.

261163032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7952 (or 7948 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 261163032 is about 16160.5393474352. The cubic root of 261163032 is about 639.2006883336.

The spelling of 261163032 in words is "two hundred sixty-one million, one hundred sixty-three thousand, thirty-two".