13561530243 has 8 divisors (see below), whose sum is σ = 18096830208. Its totient is φ = 9033625224.

The previous prime is 13561530223. The next prime is 13561530247. The reversal of 13561530243 is 34203516531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13561530243 - 2⁶ = 13561530179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13561530247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844455 + ... + 1851792.

It is an arithmetic number, because the mean of its divisors is an integer number (2262103776).

Almost surely, 2^13561530243 is an apocalyptic number.

13561530243 is a deficient number, since it is larger than the sum of its proper divisors (4535299965).

13561530243 is a wasteful number, since it uses less digits than its factorization.

13561530243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697473.

The product of its (nonzero) digits is 32400, while the sum is 33.

The spelling of 13561530243 in words is "thirteen billion, five hundred sixty-one million, five hundred thirty thousand, two hundred forty-three".