16851016685 has 16 divisors (see below), whose sum is σ = 21577085760. Its totient is φ = 12596342400.

The previous prime is 16851016681. The next prime is 16851016697. The reversal of 16851016685 is 58661015861.

It is not a de Polignac number, because 16851016685 - 2² = 16851016681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16851016681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1207991 + ... + 1221860.

It is an arithmetic number, because the mean of its divisors is an integer number (1348567860).

Almost surely, 2^16851016685 is an apocalyptic number.

It is an amenable number.

16851016685 is a deficient number, since it is larger than the sum of its proper divisors (4726069075).

16851016685 is a wasteful number, since it uses less digits than its factorization.

16851016685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429948.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 16851016685 in words is "sixteen billion, eight hundred fifty-one million, sixteen thousand, six hundred eighty-five".