561205252536 has 64 divisors (see below), whose sum is σ = 1471590650880. Its totient is φ = 178139894400.

The previous prime is 561205252483. The next prime is 561205252537. The reversal of 561205252536 is 635252502165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561205252537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6681540 + ... + 6765011.

It is an arithmetic number, because the mean of its divisors is an integer number (22993603920).

Almost surely, 2^561205252536 is an apocalyptic number.

It is an amenable number.

561205252536 is an abundant number, since it is smaller than the sum of its proper divisors (910385398344).

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

561205252536 is a wasteful number, since it uses less digits than its factorization.

561205252536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13446644 (or 13446640 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 561205252536 in words is "five hundred sixty-one billion, two hundred five million, two hundred fifty-two thousand, five hundred thirty-six".