561672620 has 48 divisors (see below), whose sum is σ = 1209116160. Its totient is φ = 219101376.

The previous prime is 561672619. The next prime is 561672677. The reversal of 561672620 is 26276165.

561672620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×561672620² = 630952264115328800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128999 + ... + 133281.

It is an arithmetic number, because the mean of its divisors is an integer number (25189920).

Almost surely, 2^561672620 is an apocalyptic number.

It is an amenable number.

561672620 is an abundant number, since it is smaller than the sum of its proper divisors (647443540).

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

561672620 is a wasteful number, since it uses less digits than its factorization.

561672620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454 (or 4452 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 561672620 is about 23699.6333304969. The cubic root of 561672620 is about 825.0768804999.

The spelling of 561672620 in words is "five hundred sixty-one million, six hundred seventy-two thousand, six hundred twenty".