561573133651806 has 32 divisors (see below), whose sum is σ = 1127249696494080. Its totient is φ = 186507198139296.

The previous prime is 561573133651781. The next prime is 561573133651813. The reversal of 561573133651806 is 608156331375165.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 561573133651806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31195255 + ... + 45785261.

It is an arithmetic number, because the mean of its divisors is an integer number (35226553015440).

Almost surely, 2^{561573133651806} is an apocalyptic number.

561573133651806 is an abundant number, since it is smaller than the sum of its proper divisors (565676562842274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561573133651806 is a wasteful number, since it uses less digits than its factorization.

561573133651806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14613448.

The product of its (nonzero) digits is 40824000, while the sum is 60.

The spelling of 561573133651806 in words is "five hundred sixty-one trillion, five hundred seventy-three billion, one hundred thirty-three million, six hundred fifty-one thousand, eight hundred six".