16393979517 has 8 divisors (see below), whose sum is σ = 21860064096. Its totient is φ = 10928607312.

The previous prime is 16393979489. The next prime is 16393979633. The reversal of 16393979517 is 71597939361.

16393979517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16393979517 - 2⁷ = 16393979389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16393979317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121858 + ... + 218259.

It is an arithmetic number, because the mean of its divisors is an integer number (2732508012).

Almost surely, 2^16393979517 is an apocalyptic number.

It is an amenable number.

16393979517 is a deficient number, since it is larger than the sum of its proper divisors (5466084579).

16393979517 is a wasteful number, since it uses less digits than its factorization.

16393979517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356187.

The product of its digits is 9644670, while the sum is 60.

The spelling of 16393979517 in words is "sixteen billion, three hundred ninety-three million, nine hundred seventy-nine thousand, five hundred seventeen".