13361640243 has 16 divisors (see below), whose sum is σ = 21017389056. Its totient is φ = 7388925120.

The previous prime is 13361640241. The next prime is 13361640251. The reversal of 13361640243 is 34204616331.

It is not a de Polignac number, because 13361640243 - 2¹ = 13361640241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13361640241) 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, 10261746 + ... + 10263047.

It is an arithmetic number, because the mean of its divisors is an integer number (1313586816).

Almost surely, 2^13361640243 is an apocalyptic number.

13361640243 is a deficient number, since it is larger than the sum of its proper divisors (7655748813).

13361640243 is a wasteful number, since it uses less digits than its factorization.

13361640243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20524834.

The product of its (nonzero) digits is 31104, while the sum is 33.

The spelling of 13361640243 in words is "thirteen billion, three hundred sixty-one million, six hundred forty thousand, two hundred forty-three".