16521650706 has 32 divisors (see below), whose sum is σ = 36135432000. Its totient is φ = 4994311680.

The previous prime is 16521650681. The next prime is 16521650741. The reversal of 16521650706 is 60705612561.

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, 279031 + ... + 333018.

It is an arithmetic number, because the mean of its divisors is an integer number (1129232250).

Almost surely, 2^16521650706 is an apocalyptic number.

16521650706 is an abundant number, since it is smaller than the sum of its proper divisors (19613781294).

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

16521650706 is a wasteful number, since it uses less digits than its factorization.

16521650706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612474.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 16521650706 in words is "sixteen billion, five hundred twenty-one million, six hundred fifty thousand, seven hundred six".