536561405523 has 160 divisors (see below), whose sum is σ = 999462385152. Its totient is φ = 281833344000.

The previous prime is 536561405519. The next prime is 536561405531. The reversal of 536561405523 is 325504165635.

536561405523 is a `hidden beast` number, since 5 + 3 + 6 + 5 + 614 + 0 + 5 + 5 + 23 = 666.

It is not a de Polignac number, because 536561405523 - 2² = 536561405519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (536561405543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 87228498 + ... + 87234648.

Almost surely, 2^536561405523 is an apocalyptic number.

536561405523 is a deficient number, since it is larger than the sum of its proper divisors (462900979629).

536561405523 is a wasteful number, since it uses less digits than its factorization.

536561405523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647 (or 6638 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 45.

The spelling of 536561405523 in words is "five hundred thirty-six billion, five hundred sixty-one million, four hundred five thousand, five hundred twenty-three".