561637673045 has 8 divisors (see below), whose sum is σ = 674000292696. Its totient is φ = 449286748416.

The previous prime is 561637673039. The next prime is 561637673059. The reversal of 561637673045 is 540376736165.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 230867757169 + 330769915876 = 480487^2 + 575126^2 .

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 561637673045 - 2⁴ = 561637673029 is a prime.

It is a Duffinian number.

It is a congruent 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, 2817752 + ... + 3010481.

It is an arithmetic number, because the mean of its divisors is an integer number (84250036587).

Almost surely, 2^561637673045 is an apocalyptic number.

It is an amenable number.

561637673045 is a deficient number, since it is larger than the sum of its proper divisors (112362619651).

561637673045 is a wasteful number, since it uses less digits than its factorization.

561637673045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5847511.

The product of its (nonzero) digits is 9525600, while the sum is 53.

The spelling of 561637673045 in words is "five hundred sixty-one billion, six hundred thirty-seven million, six hundred seventy-three thousand, forty-five".