561652290 has 96 divisors (see below), whose sum is σ = 1569559680. Its totient is φ = 138834432.

The previous prime is 561652277. The next prime is 561652337. The reversal of 561652290 is 92256165.

561652290 is a `hidden beast` number, since 561 + 6 + 5 + 2 + 2 + 90 = 666.

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 47 ways as a sum of consecutive naturals, for example, 99771 + ... + 105249.

It is an arithmetic number, because the mean of its divisors is an integer number (16349580).

Almost surely, 2^561652290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561652290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (784779840).

561652290 is an abundant number, since it is smaller than the sum of its proper divisors (1007907390).

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

561652290 is a wasteful number, since it uses less digits than its factorization.

561652290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576 (or 5573 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 561652290 is about 23699.2044170263. The cubic root of 561652290 is about 825.0669257002.

The spelling of 561652290 in words is "five hundred sixty-one million, six hundred fifty-two thousand, two hundred ninety".