16505653646 has 8 divisors (see below), whose sum is σ = 25164357384. Its totient is φ = 8117534520.

The previous prime is 16505653627. The next prime is 16505653657. The reversal of 16505653646 is 64635650561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16505653646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67646000 + ... + 67646243.

It is an arithmetic number, because the mean of its divisors is an integer number (3145544673).

Almost surely, 2^16505653646 is an apocalyptic number.

16505653646 is a deficient number, since it is larger than the sum of its proper divisors (8658703738).

16505653646 is a wasteful number, since it uses less digits than its factorization.

16505653646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135292306.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 16505653646 in words is "sixteen billion, five hundred five million, six hundred fifty-three thousand, six hundred forty-six".