16564607998 has 8 divisors (see below), whose sum is σ = 25196868720. Its totient is φ = 8165651760.

The previous prime is 16564607971. The next prime is 16564608013. The reversal of 16564607998 is 89970646561.

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

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, 58325943 + ... + 58326226.

It is an arithmetic number, because the mean of its divisors is an integer number (3149608590).

Almost surely, 2^16564607998 is an apocalyptic number.

16564607998 is a deficient number, since it is larger than the sum of its proper divisors (8632260722).

16564607998 is a wasteful number, since it uses less digits than its factorization.

16564607998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116652242.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 16564607998 in words is "sixteen billion, five hundred sixty-four million, six hundred seven thousand, nine hundred ninety-eight".