561386501 has 8 divisors (see below), whose sum is σ = 613594464. Its totient is φ = 510467760.

The previous prime is 561386491. The next prime is 561386587. The reversal of 561386501 is 105683165.

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

It is a cyclic number.

It is not a de Polignac number, because 561386501 - 2¹⁰ = 561385477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561386201) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 321395 + ... + 323136.

It is an arithmetic number, because the mean of its divisors is an integer number (76699308).

Almost surely, 2^561386501 is an apocalyptic number.

It is an amenable number.

561386501 is a deficient number, since it is larger than the sum of its proper divisors (52207963).

561386501 is a wasteful number, since it uses less digits than its factorization.

561386501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644611.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 561386501 is about 23693.5962023497. The cubic root of 561386501 is about 824.9367571967.

The spelling of 561386501 in words is "five hundred sixty-one million, three hundred eighty-six thousand, five hundred one".