561653262 has 48 divisors (see below), whose sum is σ = 1284092160. Its totient is φ = 176931216.

The previous prime is 561653251. The next prime is 561653333. The reversal of 561653262 is 262356165.

It is a happy number.

561653262 is a `hidden beast` number, since 5 + 61 + 6 + 532 + 62 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156573 + ... + 160119.

It is an arithmetic number, because the mean of its divisors is an integer number (26751920).

Almost surely, 2^561653262 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561653262, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (642046080).

561653262 is an abundant number, since it is smaller than the sum of its proper divisors (722438898).

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

561653262 is a wasteful number, since it uses less digits than its factorization.

561653262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037 (or 4034 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 561653262 is about 23699.2249240350. The cubic root of 561653262 is about 825.0674016557.

The spelling of 561653262 in words is "five hundred sixty-one million, six hundred fifty-three thousand, two hundred sixty-two".