13531202768 has 20 divisors (see below), whose sum is σ = 27758865060. Its totient is φ = 6367624704.

The previous prime is 13531202767. The next prime is 13531202777. The reversal of 13531202768 is 86720213531.

It can be written as a sum of positive squares in 2 ways, for example, as 8030310544 + 5500892224 = 89612^2 + 74168^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531202767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24873263 + ... + 24873806.

It is an arithmetic number, because the mean of its divisors is an integer number (1387943253).

Almost surely, 2^13531202768 is an apocalyptic number.

It is an amenable number.

13531202768 is an abundant number, since it is smaller than the sum of its proper divisors (14227662292).

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

13531202768 is a wasteful number, since it uses less digits than its factorization.

13531202768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49747094 (or 49747088 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 13531202768 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, seven hundred sixty-eight".