561605520363 has 8 divisors (see below), whose sum is σ = 748970482176. Its totient is φ = 374322119400.

The previous prime is 561605520353. The next prime is 561605520367. The reversal of 561605520363 is 363025506165.

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

It is not a de Polignac number, because 561605520363 - 2¹⁸ = 561605258219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561605520367) 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, 20374143 + ... + 20401688.

It is an arithmetic number, because the mean of its divisors is an integer number (93621310272).

Almost surely, 2^561605520363 is an apocalyptic number.

561605520363 is a deficient number, since it is larger than the sum of its proper divisors (187364961813).

561605520363 is a wasteful number, since it uses less digits than its factorization.

561605520363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40780425.

The product of its (nonzero) digits is 486000, while the sum is 42.

The spelling of 561605520363 in words is "five hundred sixty-one billion, six hundred five million, five hundred twenty thousand, three hundred sixty-three".