561194523 has 12 divisors (see below), whose sum is σ = 827862048. Its totient is φ = 366169200.

The previous prime is 561194509. The next prime is 561194537. The reversal of 561194523 is 325491165.

561194523 is a `hidden beast` number, since 561 + 1 + 94 + 5 + 2 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (561194509) and next prime (561194537).

It is not a de Polignac number, because 561194523 - 2¹⁰ = 561193499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561194323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 662928 + ... + 663773.

It is an arithmetic number, because the mean of its divisors is an integer number (68988504).

Almost surely, 2^561194523 is an apocalyptic number.

561194523 is a deficient number, since it is larger than the sum of its proper divisors (266667525).

561194523 is a wasteful number, since it uses less digits than its factorization.

561194523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326754 (or 1326751 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 561194523 is about 23689.5445924990. The cubic root of 561194523 is about 824.8427116123.

The spelling of 561194523 in words is "five hundred sixty-one million, one hundred ninety-four thousand, five hundred twenty-three".