16861155807 has 16 divisors (see below), whose sum is σ = 23679455360. Its totient is φ = 10642547232.

The previous prime is 16861155761. The next prime is 16861155811. The reversal of 16861155807 is 70855116861.

It is a happy number.

It is not a de Polignac number, because 16861155807 - 2¹¹ = 16861153759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16861955807) 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 15 ways as a sum of consecutive naturals, for example, 1833 + ... + 183645.

It is an arithmetic number, because the mean of its divisors is an integer number (1479965960).

Almost surely, 2^16861155807 is an apocalyptic number.

16861155807 is a deficient number, since it is larger than the sum of its proper divisors (6818299553).

16861155807 is a wasteful number, since it uses less digits than its factorization.

16861155807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183462.

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 16861155807 in words is "sixteen billion, eight hundred sixty-one million, one hundred fifty-five thousand, eight hundred seven".