561163615 has 8 divisors (see below), whose sum is σ = 675549648. Its totient is φ = 447495360.

The previous prime is 561163607. The next prime is 561163627. The reversal of 561163615 is 516361165.

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

It is not a de Polignac number, because 561163615 - 2³ = 561163607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177721 + ... + 180850.

It is an arithmetic number, because the mean of its divisors is an integer number (84443706).

Almost surely, 2^561163615 is an apocalyptic number.

561163615 is a deficient number, since it is larger than the sum of its proper divisors (114386033).

561163615 is a wasteful number, since it uses less digits than its factorization.

561163615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358889.

The product of its digits is 16200, while the sum is 34.

The square root of 561163615 is about 23688.8922282153. The cubic root of 561163615 is about 824.8275684931.

The spelling of 561163615 in words is "five hundred sixty-one million, one hundred sixty-three thousand, six hundred fifteen".