561078500 has 24 divisors (see below), whose sum is σ = 1225396536. Its totient is φ = 224431200.

The previous prime is 561078499. The next prime is 561078503. The reversal of 561078500 is 5870165.

It can be written as a sum of positive squares in 4 ways, for example, as 13424896 + 547653604 = 3664^2 + 23402^2 .

It is not an unprimeable number, because it can be changed into a prime (561078503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560579 + ... + 561578.

It is an arithmetic number, because the mean of its divisors is an integer number (51058189).

Almost surely, 2^561078500 is an apocalyptic number.

561078500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561078500 is an abundant number, since it is smaller than the sum of its proper divisors (664318036).

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

561078500 is a wasteful number, since it uses less digits than its factorization.

561078500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122176 (or 1122164 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 561078500 is about 23687.0956429867. The cubic root of 561078500 is about 824.7858642281.

The spelling of 561078500 in words is "five hundred sixty-one million, seventy-eight thousand, five hundred".