561571355223 has 24 divisors (see below), whose sum is σ = 853895605680. Its totient is φ = 354658193280.

The previous prime is 561571355221. The next prime is 561571355231. The reversal of 561571355223 is 322553175165.

561571355223 is a `hidden beast` number, since 5 + 6 + 1 + 5 + 71 + 3 + 552 + 23 = 666.

It is not a de Polignac number, because 561571355223 - 2¹ = 561571355221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561571355221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3700093 + ... + 3848873.

It is an arithmetic number, because the mean of its divisors is an integer number (35578983570).

Almost surely, 2^561571355223 is an apocalyptic number.

561571355223 is a deficient number, since it is larger than the sum of its proper divisors (292324250457).

561571355223 is a wasteful number, since it uses less digits than its factorization.

561571355223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170879 (or 170876 counting only the distinct ones).

The product of its digits is 945000, while the sum is 45.

The spelling of 561571355223 in words is "five hundred sixty-one billion, five hundred seventy-one million, three hundred fifty-five thousand, two hundred twenty-three".