561161551505 has 8 divisors (see below), whose sum is σ = 674174161152. Its totient is φ = 448409041648.

The previous prime is 561161551501. The next prime is 561161551507. The reversal of 561161551505 is 505155161165.

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 561161551505 - 2² = 561161551501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561161551501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65020199 + ... + 65028828.

It is an arithmetic number, because the mean of its divisors is an integer number (84271770144).

Almost surely, 2^561161551505 is an apocalyptic number.

It is an amenable number.

561161551505 is a deficient number, since it is larger than the sum of its proper divisors (113012609647).

561161551505 is a wasteful number, since it uses less digits than its factorization.

561161551505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130049895.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 561161551505 in words is "five hundred sixty-one billion, one hundred sixty-one million, five hundred fifty-one thousand, five hundred five".