16535531236 has 48 divisors (see below), whose sum is σ = 35028806400. Its totient is φ = 6667435008.

The previous prime is 16535531209. The next prime is 16535531249. The reversal of 16535531236 is 63213553561.

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, 2094745 + ... + 2102623.

It is an arithmetic number, because the mean of its divisors is an integer number (729766800).

Almost surely, 2^16535531236 is an apocalyptic number.

It is an amenable number.

16535531236 is an abundant number, since it is smaller than the sum of its proper divisors (18493275164).

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

16535531236 is a wasteful number, since it uses less digits than its factorization.

16535531236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12316 (or 12314 counting only the distinct ones).

The product of its digits is 243000, while the sum is 40.

The spelling of 16535531236 in words is "sixteen billion, five hundred thirty-five million, five hundred thirty-one thousand, two hundred thirty-six".