13530138245 has 64 divisors (see below), whose sum is σ = 18938162880. Its totient is φ = 9190195200.

The previous prime is 13530138233. The next prime is 13530138247. The reversal of 13530138245 is 54283103531.

It can be written as a sum of positive squares in 32 ways, for example, as 12315894529 + 1214243716 = 110977^2 + 34846^2 .

It is not a de Polignac number, because 13530138245 - 2¹⁰ = 13530137221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13530138247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12199751 + ... + 12200859.

It is an arithmetic number, because the mean of its divisors is an integer number (295908795).

Almost surely, 2^13530138245 is an apocalyptic number.

It is an amenable number.

13530138245 is a deficient number, since it is larger than the sum of its proper divisors (5408024635).

13530138245 is a wasteful number, since it uses less digits than its factorization.

13530138245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 13530138245 in words is "thirteen billion, five hundred thirty million, one hundred thirty-eight thousand, two hundred forty-five".