16994171351 has 4 divisors (see below), whose sum is σ = 17001972600. Its totient is φ = 16986370104.

The previous prime is 16994171339. The next prime is 16994171393. The reversal of 16994171351 is 15317149961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16994171351 - 2⁶ = 16994171287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16994171296 and 16994171305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16994171321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3897356 + ... + 3901713.

It is an arithmetic number, because the mean of its divisors is an integer number (4250493150).

Almost surely, 2^16994171351 is an apocalyptic number.

16994171351 is a deficient number, since it is larger than the sum of its proper divisors (7801249).

16994171351 is an equidigital number, since it uses as much as digits as its factorization.

16994171351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7801248.

The product of its digits is 204120, while the sum is 47.

The spelling of 16994171351 in words is "sixteen billion, nine hundred ninety-four million, one hundred seventy-one thousand, three hundred fifty-one".