561380826 has 32 divisors (see below), whose sum is σ = 1183206528. Its totient is φ = 177214400.

The previous prime is 561380819. The next prime is 561380843. The reversal of 561380826 is 628083165.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6201 + ... + 34076.

It is an arithmetic number, because the mean of its divisors is an integer number (36975204).

Almost surely, 2^561380826 is an apocalyptic number.

561380826 is an abundant number, since it is smaller than the sum of its proper divisors (621825702).

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

561380826 is a wasteful number, since it uses less digits than its factorization.

561380826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40406.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 561380826 is about 23693.4764439497. The cubic root of 561380826 is about 824.9339774530.

The spelling of 561380826 in words is "five hundred sixty-one million, three hundred eighty thousand, eight hundred twenty-six".