561802505 has 8 divisors (see below), whose sum is σ = 735450624. Its totient is φ = 408583600.

The previous prime is 561802489. The next prime is 561802513. The reversal of 561802505 is 505208165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561802505 - 2⁴ = 561802489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5107241 + ... + 5107350.

It is an arithmetic number, because the mean of its divisors is an integer number (91931328).

Almost surely, 2^561802505 is an apocalyptic number.

561802505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561802505 is a deficient number, since it is larger than the sum of its proper divisors (173648119).

561802505 is a wasteful number, since it uses less digits than its factorization.

561802505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10214607.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 561802505 is about 23702.3734043661. The cubic root of 561802505 is about 825.1404743963.

It can be divided in two parts, 56180 and 2505, that added together give a palindrome (58685).

The spelling of 561802505 in words is "five hundred sixty-one million, eight hundred two thousand, five hundred five".