561403136 has 144 divisors (see below), whose sum is σ = 1366896384. Its totient is φ = 224919552.

The previous prime is 561403111. The next prime is 561403163. The reversal of 561403136 is 631304165.

It is a happy number.

It is a super-2 number, since 2×561403136² = 630346962221268992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561403099 and 561403108.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2184320 + ... + 2184576.

It is an arithmetic number, because the mean of its divisors is an integer number (9492336).

Almost surely, 2^561403136 is an apocalyptic number.

561403136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561403136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683448192).

561403136 is an abundant number, since it is smaller than the sum of its proper divisors (805493248).

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

561403136 is a wasteful number, since it uses less digits than its factorization.

561403136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 561403136 is about 23693.9472439693. The cubic root of 561403136 is about 824.9449052892.

The spelling of 561403136 in words is "five hundred sixty-one million, four hundred three thousand, one hundred thirty-six".