16523521612 has 12 divisors (see below), whose sum is σ = 31140483136. Its totient is φ = 7626240720.

The previous prime is 16523521601. The next prime is 16523521613. The reversal of 16523521612 is 21612532561.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (16523521613) 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, 158879964 + ... + 158880067.

Almost surely, 2^16523521612 is an apocalyptic number.

It is an amenable number.

16523521612 is a deficient number, since it is larger than the sum of its proper divisors (14616961524).

16523521612 is a wasteful number, since it uses less digits than its factorization.

16523521612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317760048 (or 317760046 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The spelling of 16523521612 in words is "sixteen billion, five hundred twenty-three million, five hundred twenty-one thousand, six hundred twelve".