13540215016 has 8 divisors (see below), whose sum is σ = 25387903170. Its totient is φ = 6770107504.

The previous prime is 13540215001. The next prime is 13540215037. The reversal of 13540215016 is 61051204531.

It can be written as a sum of positive squares in only one way, i.e., 9874396900 + 3665818116 = 99370^2 + 60546^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 846263431 + ... + 846263446.

Almost surely, 2^13540215016 is an apocalyptic number.

It is an amenable number.

13540215016 is a deficient number, since it is larger than the sum of its proper divisors (11847688154).

13540215016 is a wasteful number, since it uses less digits than its factorization.

13540215016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692526883 (or 1692526879 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 13540215016 its reverse (61051204531), we get a palindrome (74591419547).

The spelling of 13540215016 in words is "thirteen billion, five hundred forty million, two hundred fifteen thousand, sixteen".