16500161651 has 4 divisors (see below), whose sum is σ = 16514498304. Its totient is φ = 16485825000.

The previous prime is 16500161609. The next prime is 16500161687. The reversal of 16500161651 is 15616100561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16500161651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16500161551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7166600 + ... + 7168901.

It is an arithmetic number, because the mean of its divisors is an integer number (4128624576).

Almost surely, 2^16500161651 is an apocalyptic number.

16500161651 is a deficient number, since it is larger than the sum of its proper divisors (14336653).

16500161651 is a wasteful number, since it uses less digits than its factorization.

16500161651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14336652.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 16500161651 in words is "sixteen billion, five hundred million, one hundred sixty-one thousand, six hundred fifty-one".