16641291860 has 12 divisors (see below), whose sum is σ = 34946712948. Its totient is φ = 6656516736.

The previous prime is 16641291829. The next prime is 16641291883. The reversal of 16641291860 is 6819214661.

It can be written as a sum of positive squares in 2 ways, for example, as 2057348164 + 14583943696 = 45358^2 + 120764^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416032277 + ... + 416032316.

It is an arithmetic number, because the mean of its divisors is an integer number (2912226079).

Almost surely, 2^16641291860 is an apocalyptic number.

16641291860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16641291860 is an abundant number, since it is smaller than the sum of its proper divisors (18305421088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16641291860 is a wasteful number, since it uses less digits than its factorization.

16641291860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832064602 (or 832064600 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 16641291860 in words is "sixteen billion, six hundred forty-one million, two hundred ninety-one thousand, eight hundred sixty".