16551171607 has 4 divisors (see below), whose sum is σ = 16551874576. Its totient is φ = 16550468640.

The previous prime is 16551171569. The next prime is 16551171613. The reversal of 16551171607 is 70617115561.

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-16551171607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16551171607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16551171617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314898 + ... + 363679.

It is an arithmetic number, because the mean of its divisors is an integer number (4137968644).

Almost surely, 2^16551171607 is an apocalyptic number.

16551171607 is a deficient number, since it is larger than the sum of its proper divisors (702969).

16551171607 is an equidigital number, since it uses as much as digits as its factorization.

16551171607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702968.

The product of its (nonzero) digits is 44100, while the sum is 40.

The spelling of 16551171607 in words is "sixteen billion, five hundred fifty-one million, one hundred seventy-one thousand, six hundred seven".