16851838505 has 8 divisors (see below), whose sum is σ = 20226262272. Its totient is φ = 13478766768.

The previous prime is 16851838499. The next prime is 16851838541. The reversal of 16851838505 is 50583815861.

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 16851838505 - 2¹⁶ = 16851772969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310379 + ... + 360608.

It is an arithmetic number, because the mean of its divisors is an integer number (2528282784).

Almost surely, 2^16851838505 is an apocalyptic number.

It is an amenable number.

16851838505 is a deficient number, since it is larger than the sum of its proper divisors (3374423767).

16851838505 is an equidigital number, since it uses as much as digits as its factorization.

16851838505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676015.

The product of its (nonzero) digits is 1152000, while the sum is 50.

The spelling of 16851838505 in words is "sixteen billion, eight hundred fifty-one million, eight hundred thirty-eight thousand, five hundred five".