561506650 has 24 divisors (see below), whose sum is σ = 1066628160. Its totient is φ = 219822960.

The previous prime is 561506629. The next prime is 561506653. The reversal of 561506650 is 56605165.

It is not an unprimeable number, because it can be changed into a prime (561506653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117120 + ... + 121819.

It is an arithmetic number, because the mean of its divisors is an integer number (44442840).

Almost surely, 2^561506650 is an apocalyptic number.

561506650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561506650 is a deficient number, since it is larger than the sum of its proper divisors (505121510).

561506650 is a wasteful number, since it uses less digits than its factorization.

561506650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238998 (or 238993 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 561506650 is about 23696.1315408233. The cubic root of 561506650 is about 824.9956045067.

The spelling of 561506650 in words is "five hundred sixty-one million, five hundred six thousand, six hundred fifty".