16508649961 has 8 divisors (see below), whose sum is σ = 16704597600. Its totient is φ = 16312934880.

The previous prime is 16508649931. The next prime is 16508649977. The reversal of 16508649961 is 16994680561.

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

It is a cyclic number.

It is not a de Polignac number, because 16508649961 - 2⁵ = 16508649929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16508649931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86806 + ... + 201376.

It is an arithmetic number, because the mean of its divisors is an integer number (2088074700).

Almost surely, 2^16508649961 is an apocalyptic number.

It is an amenable number.

16508649961 is a deficient number, since it is larger than the sum of its proper divisors (195947639).

16508649961 is a wasteful number, since it uses less digits than its factorization.

16508649961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116279.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 16508649961 in words is "sixteen billion, five hundred eight million, six hundred forty-nine thousand, nine hundred sixty-one".