561645350 has 48 divisors (see below), whose sum is σ = 1218300000. Its totient is φ = 192558240.

The previous prime is 561645323. The next prime is 561645373. The reversal of 561645350 is 53546165.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 561645350.

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, 776 + ... + 33524.

It is an arithmetic number, because the mean of its divisors is an integer number (25381250).

Almost surely, 2^561645350 is an apocalyptic number.

561645350 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561645350 is an abundant number, since it is smaller than the sum of its proper divisors (656654650).

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

561645350 is a wasteful number, since it uses less digits than its factorization.

561645350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32782 (or 32763 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 561645350 is about 23699.0579981568. The cubic root of 561645350 is about 825.0635274007.

The spelling of 561645350 in words is "five hundred sixty-one million, six hundred forty-five thousand, three hundred fifty".