13156535436 has 48 divisors (see below), whose sum is σ = 33961068288. Its totient is φ = 3930673600.

The previous prime is 13156535411. The next prime is 13156535453. The reversal of 13156535436 is 63453565131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 692535 + ... + 711278.

It is an arithmetic number, because the mean of its divisors is an integer number (707522256).

Almost surely, 2^13156535436 is an apocalyptic number.

It is an amenable number.

13156535436 is an abundant number, since it is smaller than the sum of its proper divisors (20804532852).

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

13156535436 is a wasteful number, since it uses less digits than its factorization.

13156535436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403902 (or 1403900 counting only the distinct ones).

The product of its digits is 486000, while the sum is 42.

The spelling of 13156535436 in words is "thirteen billion, one hundred fifty-six million, five hundred thirty-five thousand, four hundred thirty-six".