561512630 has 64 divisors (see below), whose sum is σ = 1196076672. Its totient is φ = 185794560.

The previous prime is 561512603. The next prime is 561512657. The reversal of 561512630 is 36215165.

It is an interprime number because it is at equal distance from previous prime (561512603) and next prime (561512657).

It is a junction number, because it is equal to n+sod(n) for n = 561512593 and 561512602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277382 + ... + 279398.

It is an arithmetic number, because the mean of its divisors is an integer number (18688698).

Almost surely, 2^561512630 is an apocalyptic number.

561512630 is an abundant number, since it is smaller than the sum of its proper divisors (634564042).

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

561512630 is a wasteful number, since it uses less digits than its factorization.

561512630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 561512630 is about 23696.2577214209. The cubic root of 561512630 is about 824.9985332083.

Adding to 561512630 its reverse (36215165), we get a palindrome (597727795).

The spelling of 561512630 in words is "five hundred sixty-one million, five hundred twelve thousand, six hundred thirty".